Publications

S. Funken, J. Martan, H. Riegel "Investigation on laser material processing of glass by simultaneous short and ultrashort pulses", 9th International Congress on Laser Advanced Materials Processing (LAMP), Ise-city, Mie-prefecture, Japan, 2025 June 10-13, Presentation and Conference Proceeding

J. Kortsch-Banzhaf, F. Schäfer, S. Ruck, F. Köhn, H. Riegel, M. Merkel, J. Albrecht "Laser Patterning of TiAlN for the Creation of Surfaces with Selective, Anisotropic Wetting", In H. Altenbach, H. Hitzler, L. Johlitz, M. Merkel, M. Öchsner (eds), Lectures Notes on Advanced Structured Materials 3, Advanced Structured Materials, Volume 226, 2025, Pages 415-425, https://doi.org/10.1007/978-3-031-77403-4_24

R. Wenger, P. Hegele, M. Hofele, J. Neuer, H. Riegel "Laser-Based Closed-Loop Controlled Heat Treatment for Residual Stress Relief of Additively Manufactured AlSi10Mg Components", Advanced Engineering Materials, Volume 27, Issue 1, 2401777, 2025, https://doi.org/10.1002/adem.202401777

J. Sandherr, M. Bolsinger, M.-J. Kleefoot, V. Knoblauch, " A combined electrochemical and microscopical analysis on the effect of laser structuring on Li plating of graphite anodes for lithium-ion batteries", Journal of Energy Storage, Volume 102, Part B, 114187, 2024, https://doi.org/10.1016/j.est.2024.114187

A. Kaiser, M.-J. Kleefoot, H. Riegel, "A novel method to calibrate a fast IR-measurement system by utilizing the temperature dependence of oxide layers", Procedia CIRP, Volume 124, 2024, Pages 621-624, doi.org/10.1016/j.procir.2024.08.187

S. Funken, M.-J. Kleefoot, J. Martan, H. Riegel, "Experimental investigation of density shift through glass surface modification with ultrashort pulsed laser", Procedia CIRP, Volume 124, 2024, Pages 625-628, doi.org/10.1016/j.procir.2024.08.188

M. Hofele, H. Antony, D. Kolb, H. Riegel, "Production of soft magnetic FeSi6.5 parts with precise layer topography using integrated laser remelting at PBF-LB/M to induce multi-material lamination", Procedia CIRP, Volume 124, 2024, Pages 6-11, doi.org/10.1016/j.procir.2024.08.060

M. Hofele, M. Buser, "Increasing productivity by combining laser processes", PhotonicsViews 21(4), pages 48-52 (2024), doi.org/10.1002/phvs.202400028

M. Hofele, T. Willburger, H. Riegel, "Defect Formation at Laser Welding of Battery Cells Due to Electrolyte Contamination" LaserEMobility Workshop 2024

M. Steudel, M.-J. Kleefoot, S. Funken, A. Banholzer, M. Wolf, S. Schuhmacher, U. Morgner, A. Harth, "Noninvasive characterization methods for ultra-short laser pulse induced volume modifications", Optics Express 32 (11), pages 19221-19229 (2024), https://doi.org/10.1364/OE.515308

M. Henn, J. Schurr, M. Hofele, M. Schmid, S. Knecht, "Design and production of customized multi-material components for future electric machines at the Innovation Campus Mobility of the Future (ICM)", Lasermagazin, 2, 2024

M.-J. Kleefoot, J. Martan, J. Sandherr, V. Knoblauch, H. Riegel, "Investigation of process mechanisms in laser-based microstructure adaptation of lithium-ion electrodes by fast IR-emission measurement", Proc. SPIE 12873, Laser-based Micro- and Nanoprocessing XVIII, 128730L, March 2024, https://doi.org/10.1117/12.3000716

S. Funken, T. Willburger, M.-J. Kleefoot, J. Martan, H. Riegel, "Comparative analysis of waveguide fabrication in BK7 and fused silica by ultrashort-pulsed lasers using long focal length", Proc. SPIE 12873, Laser-based Micro- and Nanoprocessing XVIII, 1287302, March 2024, https://doi.org/10.1117/12.3001783

M. Hofele, L. Hitzler, J. Schanz, "Laser Polishing of PBF-LB Fabricated AlSi10Mg-Achievable Surface Quality and Implications on the Mechanical Properties Through Heat Input", Collaborative Research Advancing Engineering Solutions for Real-World Challenges, Springer, 2024, https://doi.org/10.1007/978-3-031-48521-3_4

M. Hofele, "Laser Based Post Processing of Additively Manufactured Aluminum Surfaces",

S.Ruck, "Ultra-short pulsed laser surface texturing on additive manufactured metal surfaces to modify optical properties",

M.Buser, M. Hofele, T. Menold, H. Riegel, A. Michalowski, "Enhanced Scaling of Material Removal Rate with High Surface Quality Through Combined Laser Processes", Lasers in Manufacturing and Material Processing, Springer, 2023 , doi.org/10.1007/s40516-023-00234-5

S.Nester, D. Meinhard, J. Schanz, M. Rettenberger, I.Taha, H. Riegel, V. Knoblauch, "Joining of Aluminum and CFRP via Laser Powder Bed Fusion: Influence of Experimental Set-Up and Laser Processing on Microstructure and Mechanical Properties, Polymers, MDPI, 2023, 15, https://doi.org/10.3390/polym15183839

P. Kaya, D. Kolb, E. Reisacher, S. Kreißl, S. Ruck, H. Riegel, V. Knoblauch, "Microstructural Investigations on Selectively Laser Treated Li6.6La3Zr1.6Ta0.4O12 Solid Electrolyte for Solid-State Batteries", Microscopy and Microanalysis 29 (2023), Supplement_1, pages 1450-1451, https://doi.org/10.1093/micmic/ozad067.745

S. Funken, M. Kleefoot, C. Neusüß, H. Riegel, " Surface topology and shape investigation of soda-lime glass structured by ultrashort pulsed laser with long focal length", Laser in manufacturing 2023, 26 - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_1203.pdf

A. Kaiser, M. Kleefoot, E. Oliveria, H. Riegel, " Process temperature measurement in the production of metal oxide layers by fast IR-detector", Laser in manufacturing 2023, 26. - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_291.pdf

T. Willburger, M. Kleefoot, H. Riegel, " Inscription of waveguides and beam splitters in borosilicate glass using a femtosecond laser with a long focal length ", Laser in manufacturing 2023, 26. - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_209.pdf

D. Kolb, M. Hofele, M. Henn, M. Buser, V. Onuseit, T. Graf, H. Riegel, " Enhancement of additive manufactured soft magnetic components by precise air gaps combining Laser Powder Bed Fusion and ultrafast laser ablation ", Laser in manufacturing 2023, 26. - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_274.pdf

N. Seiler, M. Hofele, M. Dauner, H. Riegel, " Surface smoothening of thermal sprayed Hastelloy C-276 coatings by laser polishing ", Laser in manufacturing 2023, 26. - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_214.pdf

R. Wenger, M. Hofele, A. Oster, D. Reitemeyer, H. Kriz, H. Riegel, "Design of a Research System for Process Monitoring and Closed-Loop Control of Laser Powder Bed Fusion" Laser in manufacturing 2023, 26. - 29.06.2023, Munich, https://wlt.de/sites/default/files/2023-09/Contribution_283.pdf

D. Moskal, J. Martan, M. Honner, C. Beltrami, M.-J. Kleefoot, V. Lang, " Inverse dependence of heat accumulation on pulse duration in laser surface processing with ultrashort pulses", International Journal of Heat and Mass Transfer 213 (2023), 124328, doi.org/10.1016/j.ijheatmasstransfer.2023.124328

J. Sandherr, M.-J. Kleefoot, S. Nester, C. Weisenberger, A. K.M. DeSilva, D. Michel, S. Reeb, M. Fingerle, H. Riegel, V. Knoblauch, "Micro embossing of graphite-based anodes for lithium-ion batteries to improve cell performance", Journal of Energy Storage 65 (2023), 107359, doi.org/10.1016/j.est.2023.107359

M.-J. Kleefoot, S. Sandherr, V. Knoblauch, J. Martan, H. Riegel, "Microstructural Adaptation of Electrodes for Li-Ion Batteries by Laser Processing - Effects of Structuring on Performance and Process Understanding", LaserEMobility Workshop, March 13 - 14, 2023, Milano, Italy

D. Meinhard, S. Nester, J. Schanz, T. Pott, H. Riegel, V. Knoblauch, Hybrid joining of aluminum alloys and thermoplastic CFR-PA12 manufactured by IR-irradiation: Influence of pre-treatment and aging on the mechanical properties, Materials and Corrosion, https://doi.org/10.1002/maco.202213697

J. Schanz, "Influence of the surface pretreatment on the mechanical strength and ageing behavior of adhesively bonded carbon fiber reinforced polymer - aluminium joints"

M. Reiberg, L. Hitzler, L. Apfelbacher, J. Schanz, D. Kolb, H. Riegel, E. Werner, "Additive Manufacturing of CrFeNiTi Multi-Principal Element Alloys", Materials 2022, 15, 7892, doi.org/10.3390/ma15227892

J. Sandherr, S. Nester, M.J. Kleefoot, M. Bolsinger, C. Weisenberger, A. Haghipour, D.K. Harrison, S. Ruck, H. Riegel, V. Knoblauch, "Improving the ionic transport properties of graphite anodes for lithium ion batteries by surface modification using nanosecond laser", J. Power Sources 549 (2022), 232077, doi.org/10.1016/j.jpowsour.2022.232077

V. Knoblauch, J. Sandherr, M.J. Kleefoot, M. Bolsinger, S. Nester, C. Weisenberger, S. Ruck, H. Riegel, "Microstructuring of Electrodes for Li-Ion Batteries By Means of Laser Machining and Microembossing - a Promising Approach to Overcome Transport Limitations and to Improve Their Fast Charging Capability", 241st ECS Meeting, MA2022-01, May 29 - June 02, 2022, Vancouver, Canada, doi.org/10.1149/MA2022-012343mtgabs

M. Bauer, M. Schlotz, K. Blessing, F. Wagner, M. Hofele, H. Riegel, M. Kley, " Generation of reproducible and scalable local damage to rolling bearings for the development of condition monitoring systems through the use of laser technology", tm - Technisches Messen 2022, doi.org/10.1515/teme-2022-0083

M. Bures, M.J. Kleefoot , Y. Bakir, M. Zetek, "LASER MACROPOLISHING OF ADDITIVELY MANUFACTURED PARTS OF MARAGING STEEL WITH RESPECT TO SURFACE PROPERTIES", MM Science Journal (2022), pages 5918-5925, https://doi.org/10.17973/MMSJ.2022_10_2022125

N. Seker, E. Benz, S. Schuhmacher, S. Ruck, M.J. Kleefoot, H. Riegel, T. Djuric-Rissner, P. Hoffrogge, P. Czurratis, "Characterization of laser-welded structures in glass using acoustic microscopy", Practical Metallography, 59 (2022), pages 520-531, https://doi.org/10.1515/pm-2022-0053

M.J. Kleefoot, J. Sandherr, M. Sailer, S. Nester, J. Martan, V. Knoblauch, M. Kumkar, H. Riegel, "Investigation on the parameter dependency of the perforation process of graphite based lithium-ion battery electrodes using ultrashort laser pulses", Journal of Laser Applications 34 (2022), https://doi.org/10.2351/7.0000757

S. Ruck, M.J. Kleefoot, D.K. Harrison, A. De Silva, H. Riegel, "Direct laser writing of optical gratings on additive manufactured metal surfaces", 12th CIRP Conference on Photonic Technologies [LANE 2022] on September 04-08, 2022, presentation and peer-reviewed paper, Procedia CIRP 111 (2022), pages 653-656, doi.org/10.1016/j.procir.2022.08.004

P. Grub, M. Hofele, J. Schanz, D. Kolb, H. Riegel, "Laser polishing of additive manufactured L-PBF copper parts with visible laser wavelength of 515 nm - Challenges due to high surface roughness", 12th CIRP Conference on Photonic Technologies [LANE 2022] on September 04.-08.2022, presentation and peer-reviewed paper, Procedia CIRP 111 (2022), pages 684-688, doi.org/10.1016/j.procir.2022.08.009

N. Seiler, D. Kolb, J. Schanz, D. Goll, H. Riegel, "Influence of modulated laser power on the surface topography and microstructure in the Laser Powder Bed Fusion process", 12th CIRP Conference on Photonic Technologies [LANE 2022] on September 04.-08.2022, presentation and peer-reviewed paper, Procedia CIRP 111 (2022), pages 693-696, doi.org/10.1016/j.procir.2022.08.018

M.J. Kleefoot, J. Martan, C. Beltrami, J. Sandherr, M. Honner, S. Ruck, V. Knoblauch, H. Riegel, "Process temperature measurement during nanosecond pulse laser micromachining of Li-Ion battery electrodes", 12th CIRP Conference on Photonic Technologies [LANE 2022] on September 04.-08.2022, presentation and peer-reviewed paper, Procedia CIRP 111 (2022), pages 806-809, doi.org/10.1016/j.procir.2022.08.133

M. Henn, M. Buser, V. Lubkowitz, D. Kolb, M. Hofele, "Novel laser-based powder bed fusion processes for next-gen electrical drives", Laser Focus World, Vol. 58, Issue 6, 2022, digital.laserfocusworld.com/laserfocusworld/202206/MobilePagedReplica.action

M. Hofele, A. Roth, P. Hegele, T.Schubert, J.Schanz, D.K. Harrison, A.K.M. De Silva, H. Riegel, H, "Influence of Laser Polishing on the Material Properties of Aluminum L-PBF Components; Metals 2022, 12, 750, doi.org/10.3390/met12050750

J. Schanz, N. Islam, D. Kolb, D. K. Harrison, A. K. M. De Silva, D. Goll, G. Schneider, H. Riegel, "Individual process development of single and multi-material laser melting in novel modular laser powder bed fusion system", Prog. Addit. Manuf. 7 (2022), pages 481-493, doi.org/10.1007/s40964-022-00276-9

J. Schanz, D. Meinhard, S. Nester, I. Dostal, A. K. M. De Silva, D. K. Harrison, H. Riegel, V. Knoblauch, "Laser surface treatment of carbon fiber reinforced polymer using near-infrared laser wavelength with varied process parameters", Journal of Laser Applications, Vol. 34, 012024 (2022), pages 1-13, doi.org/10.2351/7.0000554

M.J. Kleefoot, S. Enderle, J. Sandherr, M. Bolsinger, T. Maischik, N. Simon, J. Martan, S. Ruck, V. Knoblauch, H. Riegel, "Enhancement of the wettability of graphite-based lithium-ion battery anodes by selective laser surface modification using low energy nanosecond pulses", J. Adv. Manuf. Technol. 118 (2022), pages 1987-1997, doi.org/10.1007/s00170-021-08004-3

S. Ruck, D.K. Harrison, A. DeSilva, S. Dikel, M. Kleefoot, H. Riegel, Influence of the initial surface roughness on the ablation efficiency of metals, Scientific Reports der Hochschule Mittweida, ISSN 1437-7624, Issue 3, 2021 pp.19-22

S. Ruck, Improvement of the fast charging capability of lithium-ion batteries by surface functionalization with the laser, 4th OptecNet Annual Conference Paper, November 2021

M. Hofele, A. Roth, J. Schanz, J. Neuer, D. K. Harrison, A. K. M. De Silva, H. Riegel, " Laser Polishing of Additive Manufactured Aluminum Parts by Modulated Laser Power", Micromachines (2021), https://doi.org/10.3390/mi12111332

F. Steidle, M. Hofele, G. Ketzer-Raichle, M. Gooßen, H. Riegel, "Integrated laser based pre-tempering at laser welding of AISI 1045 steel by using 3D- scanner optics", Materialwiss. Werkstofftech. 2021, 52, 1-23, doi.org/10.1002/mawe.202100074

J. Schanz, S. Nester, D. Meinhard, T. Pott, H. Riegel, A. K. M. De Silva, D. K. Harrison, V. Knoblauch, "Adhesively bonded CFRP/Al joints: Influence of the surface pretreatment on corrosion during salt spray test", Materials and Corrosion (2021), Vol. 73, Issue 2, pages 158-170, doi.org/10.1002/maco.202112752

W. Schulz, F. Köhn, D. Kolb, M. Balzer, H. Riegel, J. Albrecht, "Controlling Friction and Wear with Anisotropic Microstructures in MoN-Coated Surfaces" Tribology Letters (2021) 69:152, https://doi.org/10.1007/s11249-021-01531-w

F. Trauter, J. Schanz, H. Riegel, T. Bernthaler, D. Goll, G. Schneider," Bulk Nanocrystalline Permanent Magnets by Selective Laser Melting", Pract. Metallogr. 58 (2021) 10, page 630 - 643, doi.org/10.1515/pm-2021-0055

P. Kaya, S. Kreißl , D. Kolb, E. Reisacher, S. Ruck, H. Riegel, V. Knoblauch, "Microstructural investigations on selectively laser treated LLZTO solid electrolyte", Microscopy Conference (MC2021), 22-26.08.2021, Vienna, Austria (online), Poster presentation

J. Schanz, D. Meinhard, T. Pott, S. Nester, A.K.M. De Silva, D.K. Harrison, H. Riegel, V. Knoblauch, "Adhesively bonded hybrid Al-CFRP joints: Influence of pre-treatment, adhesive chemistry as well as corrosion and ageing processes on the mechanical properties", 24th International Conference on Composite Structures, ICCS24, Porto, Portugal, June 14-18, 2021

D. Meinhard, J. Schanz, T. Pott, A.K.M. De Silva, D.K. Harrison, H. Riegel, V. Knoblauch, "Hybrid aluminum alloy and thermoplastic CFR-PA12 joints manufactured by IR-irradiation: Influence of pre-treatment and ageing on the mechanical properties" 24th International Conference on Composite Structures, ICCS24, Porto, Portugal, 14-18 June 2021

M. Hofele, A.K.M. De Silva, D.K. Harrison, H. Riegel, "Laser Polishing of Additive Manufactured Aluminum AlSi10Mg Laser Powder Bed Fusion Parts by Modulated Laser Radiation", 14th International Conference on Advanced Computational Engineering and Experimenting ACEX 2021, Malta, July 4-8, 2021

J. Schanz, D. Meinhard, S. Nester, I. Dostal, H. Riegel, A.K.M. De Silva, D.K. Harrison, V. Knoblauch, "Laser Surface Treatment of CFRP Using Near-Infrared Laser Wavelength with Varied Primary and Secondary Process Parameters", 14th International Conference on Advanced Computational Engineering and Experimenting ACEX 2021, Malta, July 4-8, 2021

D. Kolb, J. Neuer, C. Deininger, T. Matsumoto, H. Riegel, "Microstructure and Mechanical Properties of Non-Combustible AZX912 Magnesium Alloy Products Fabricated by Selective Laser Melting", 14th International Conference on Advanced Computational Engineering and Experimenting ACEX 2021, Malta, July 4-8, 2021

M. Hofele, J. Neuer, M. Lindenberger-Ullrich, J. Schanz, D. K. Harrison, A. K. M. De Silva, H. Riegel, "Laser cleaning as a productive surface post-treatment method for L-PBF parts", Laser in Manufacturing (LIM), June 2021

M. Kleefoot, S. Ruck, J. Martan, J. Sandherr, M. Bolsinger, V. Knoblauch, H. Riegel, "Modeling of selective laser ablation of lithium-ion battery electrodes", Laser in Manufacturing (LIM), June 2021

F. Schaefer, S. Ruck, M. Kleefoot, W. Schulz, F.Köhn, J. Albrecht, H. Riegel, "Superhydrophobic surfaces using ultra-short pulse structuring of thin metals", Laser in Manufacturing (LIM), June 2021

S. Ruck, D. K. Harrison, A. K. M. De Silva, M. Jonathan Kleefoot, H. Riegel, "Influence of the build angle dependent surface quality on the ultra-short pulsed laser ablation of additive manufactured AlSi10Mg samples", Laser in Manufacturing (LIM), June 2021

Schanz J., Meinhard D., Dostal I., Riegel H., de Silva, A. K. M., Harrison D. K., Knoblauch V., Comprehensive study on the influence of different pretreatment methods and structural adhesives on the shear strength of hybrid CFRP/aluminum joints - The Journal of Adhesion (2021), pp. 1-29, doi.org/10.1080/00218464.2021.1938004

Goll D., Trauter F., Bernthaler T., Schanz J., Riegel H., Schneider G., Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets. Micromachines 2021, 12(5), 538 ; doi.org/10.3390/mi12050538

Islam, N., Schanz J., Kolb D., Riegel H., Improvement of Surface Quality and Process Area Rate in Selective Laser Melting by Beam Oscillation Scan Technique. J. of Materi Eng and Perform (2021). https://doi.org/10.1007/s11665-021-05665-9

Hofele M., Schanz J., Roth A., De Silva A. K. M. , Harrison D.K., Riegel H., Process parameter dependencies of continuous and pulsed laser modes on surface polishing of additive manufactured aluminum AlSi10Mg parts, Materials Science and Materials Engineering, 52 Issue 4, (2021), DOI: 10.1002/mawe.202000335

Ruck, S., Harrison, D.K. , DeSilva, A., Kleefoot M.J., and Riegel, H., Single Track Ultra-short Pulsed Laser Ablation on Additive Manufactured Metallic Surfaces, Journal of Laser Micro/Nanoengineering, 16, (2021), 1, DOI: 10.2961/jlmn.2021.01.2007

Hofele, M., Roth, A., Schanz, J., Harrison, D.K., DeSilva, A.K.M. and Riegel, H. Laser Polishing of Laser Powder Bed Fusion AlSi10Mg Parts-Influence of Initial Surface Rough-ness on Achievable Surface Quality, Materials Sciences and Applications, 12, (2021), pp.15-41, DOI: 10.4236/msa.2021.121002

S. Enderle, M. Bolsinger, S. Ruck, V. Knoblauch, H. Riegel: "Thermophysical modeling of selective laser ablation processing of lithium-ion battery cathodes" Journal of Laser Applications 32, 042008 (2020) Link to text

P. Kaya, S. Kreißl, D. Kolb, E. Reisacher, S. Ruck, H. Riegel, V. Knoblauch: Selective Laser Sintering of Solid State Battery Components: A Preliminary Study on Laser-powder Interaction - Li[NiMnCo]O2 & Li6.6La3Zr1.6Ta0.4O12, young Ceramists Additive Manufacturing Forum (yCAM) 2020, October 28-30 2020, Poster presentation

M. Schneckenburger, M. Hofele, J. Raab, S. Ruck, D. Harrison, H. Riegel, R. Börret: Additive manufactured injection molds with optical quality surfaces, euspen's 20th International Conference &Exhibition, Geneva, CH, June 2020Linkto text

S. Ruck, D.K. Harrison, A. De Silva, M.-J. Kleefoot, H. Riegel: "Single track ultra-short pulsed laser ablation on additive manufactured metallic surfaces" Proceedings, Laser Precision Microfabrication Symposium, June 2020, DresdenLinkto text

J. Schanz, S. Kambach, D. Meinhard, A. De Silva, D.K. Harrison, H. Riegel, V. Knoblauch: Study on hygrothermal ageing behavior of hybrid CFRP/Al joints - Influence of pre-treatment, adhesive composition and ageing process, 4th International Conference - Hybrid 2020 - Materials and Structures - April 28 - 29, 2020 - Presentation and peer-reviewed conference proceeding Link to text

D. Meinhard, J. Schanz, S. Altvater, D. Meinhard, H. Riegel, D.K. Harrison, V. Knoblauch: Rapid direct thermal joining of aluminum alloys and thermoplastic carbon fiber reinforced polyamides by means of NIR-radiation: Influence of pre-treatment and joining process parameters on the joint strength, 4th International Conference - Hybrid 2020 - Materials and Structures - April 28 - 29, 2020 - Presentation

D. Goll, J. Schurr, F. Trauter, J. Schanz, T. Bernthaler, H. Riegel, G. Schneider: Additive manufacturing of soft and hard magnetic materials, 11th CIRP Conference on Photonic Technologies [LANE 2020] on September 6-10, 2020 - Presentation and peer-reviewed paper, Procedia CIRP 94 (2020) 248-253Linkto text

J. Schanz, M. Gooßen, D. Meinhard, D. Harrison, A. De Silva, V. Knoblauch, H. Riegel "Laser-based surface treatment of CFRP and aluminum for adhesively bonded hybrid joints" Proceedings Volume 11268, Laser-based Micro- and Nanoprocessing XIV; 1126819 (2020) (9 March 2020) - SPIE LASE, 2020, San Francisco, California, United States Link to text

M. Bolsinger, M. Weller, S. Ruck, H. Riegel, V. Knoblauch, "Selective surface treatment by means of IR-laser - a new approach to enhance the rate capability of electrodes for Li-ion batteries", Electrochemica Acta 330 (2020), pp. 135-163

J. Schanz, D. Meinhard, M. Gooßen, H. Riegel, V. Knoblauch, 'Laser surface pretreatment of lightweight materials to increase adhesive strength' Technology Day Lightweight Construction Regional, Schwäbisch Gmünd, October 24, 2019

J. Schanz, D. Meinhard, M. Gooßen, H. Riegel, A. De Silva, D.K. Harrison, V. Knoblauch, 'Near-infrared Laser Pretreatment of Carbon Fiber Reinforced Plastic for Adhesive Bonding', Presentation and Poster at the 5th International Composites Conference, Stuttgart, Germany, September 10-12, 2019

D. Meinhard, J. Schanz, H. Riegel, A. De Silva, D.K. Harrison, V. Knoblauch, 'Adhesive Joining Processes - Influence of Process Control, Material Selection and Aging on the Mechanical Performance of Hybrid Multi-Material Systems', Presentation and Poster at the 5th International Composites Conference, Stuttgart, Germany, September 10-12, 2019

D. Hohs, F. Trauter, U. Pflanz, J. Schurr, T. Bernthaler, J. Schanz, H. Riegel, D. Goll, G. Schneider, 'Ultrafine microstructures by selective laser melting of Fe-Nd-B' 52nd Materialography Conference; meeting, Dresden, Germany, 19.09.2019

S. Ruck, S. Enderle, M.Bolsinger, M. Weller, V. Knoblauch, H. Riegel, "Enhancing the rate capability of highly densified Li-Ion battery cathodes by selective laser ablation", Proc. SPIE 10906, Laserbased Micro- and Nanoprocessing XIII, 109061D (4 March 2019); doi: 10.1117/12.2510073

T. Schubert, J. Schurr, D. Kolb, S. Ruck, M. Hofele, T.Bernthaler, H.Riegel, G.Schneider, "Individual material and process development in laser based additive manufacturing", Proc. SPIE 10909, Laser 3D Manufacturing VI, 109090G (4 March 2019); doi: 10.1117/12.2508241SPIE

M. Braun, M. Hofele, J. Schanz, S. Ruck, M. Pohl, R. Börret, H. Riegel, "Time-based offline track planning of robot guided laser applications for complex 3D freeform surfaces," Proc. SPIE 10909, Laser 3D Manufacturing VI, 109090V (4 March 2019); doi: 10.1117/12.2508340

M. Hofele, D. Kolb, S. Ruck, H. Riegel: "High-speed thermography in laser soldering", Laser, Issue 2, 2019, pp. 24-26

L. Abele, A.K. Jäger, W. Schulz, S. Ruck, H. Riegel, T. Sörgel, J. Albrecht: "Superoleophobic surfaces via functionalization of electrophoretic deposited SiO2 spheres on smart aluminum substrates", Appl. Surf. Sci., Vol. 490, 2019, Pages 56-60, doi.org/10.1016/j.apsusc.2019.06.046

D. Goll, D. Schuller, G. Martinek, T.Kunert, J. Schurr, C. Sinz, T. Schubert, T.Bernthaler, H.Riegel, G. Schneider: "Additive manufacturing of soft magnetic materials and components", ADDMA, Vol. 27, 2019, Pages 428 - 439, doi.org/10.1016/j.addma.2019.02.021

A.Heinrich, R.Börret, M.Merkel, H. Riegel, Additive manufacturing of reflective and transmissive optics: potential and new solutions for optical systems, SPIE, San Francisco, California, United States, 2018

J. Schanz, I. Dostal, D. Meinhard, V. Reitz, S. Ruck, R. Riegel, V. Knoblauch: "Evaluation of laser pretreatment on surface and strength properties of hybrid CFRP/Al Fraternities and sororities/clubs." 119th Annual Conference of the German Society for Applied Optics e. V. (DGaO), Aalen, 2018

J. Schanz, M. Hofele, S. Ruck, H. Riegel: "Process windows and strategies for laser polishing of additively manufactured metal surfaces." 119th Annual Conference of the German Society for Applied Optics e. V. (DGaO), Aalen, 2018

D. Schuller, T. Kunert, J. Schurr, T. Schubert, C. Sinz, T. Bernthaler, H. Riegel, M. Merkel, D. Goll, G. Schneider, Realization of novel soft magnetic structures and components by additive manufacturing, 8th INTERNATIONAL CONFERENCE ON MAGNETISM AND METALLURGY, Dresden 2018

J. Neuer, Y. Tiryaki, M. Hofele, B. Burzic H. Riegel: "Laserstrahlschweißen von S235JR im Unterdruck" Proceeding, 119th Annual Conference of the German Society for Applied Optics e. V. (DGaO), Aalen, 2018

S. Ruck, B. Burzic, L. Langlotz, H. Riegel: "Laser processing of superhard polycrystalline diamond cutting materials for machining" Proceeding, 119th Annual Conference of the German Society for Applied Optics e. V. (DGaO), Aalen, 2018

D. Kolb, J. Schurr, S. Ruck, G. Schneider, H. Riegel: "Laser processing of customized powder materials in flexible process chambers for additive manufacturing" Proceeding, 119th Annual Conference of the German Society for Applied Optics e. V. (DGaO), Aalen, 2018

D. Goll, D. Vogelgsang, U. Pflanz, D. Hohs, T. Grubesa, J. Schurr, T. Bernthaler, D. Kolb, H. Riegel, G. Schneider "Refining the Microstructure of Fe-Nd-B by Selective Laser Melting", Phys. Status Solidi RRL (2018), DOI: 10.1002/pssr.201800536

M. Herden, T. Sube, H. Riegel, T. Sörgel, B. Hader, J. Albrecht: "Multicomponent metal surfaces with structures on micrometer scale" Galvanotechnik, Vol. 109, 2018, Pages 460-466

T. Rieger, A. Arnold, A. Breninek, T. Schubert, J. Schurr, H. Riegel, M. Merkel, T. Bernthaler, G. Schneider: "Entwicklung von Powvern und Prozessparametern für die additive Fertigung von WC-Co-Werkstoffen", Proceedings DGM Fachtagung Werkstoffe und Additive Fertigung, Potsdam, 2018, Pages 159-165

T. Schubert, T. Rieger, D. Kolb, T. Bernthaler, H. Riegel, G. Schneider: "Influence of special carbides on the microstructure formation in additively manufactured WC-Co cemented carbide", DGM Prakt. Met. Special Volume, Vol. 52, 2018, Pages 235-240

B. Burzic, M. Hofele, S. Mürdter, H. Riegel, Laser polishing of ground aluminum surfaces with high energy cw - laser, Journal of Laser Applications, Laser Intstitute of America, 2017, Vol.29, Issue 1,DOI: 10.2351/1.4966923

J. Schanz, M. Hofele, S. Ruck, T. Schubert, L. Hitzler, G. Schneider, M. Merkel, H. Riegel, Metallurgical Investigations of Laser Remelted Additively Manufactured AlSi10Mg Parts, Mat.-wiss. u. Werkstofftech. 48, No. 5, 2017, DOI: 10.1002/mawe.201700039

J. Schanz, J. Neuer, S. Ruck, H. Riegel, Smooth Weld-Seams by use of Structured Surface in Key-Hole-Welding, Conference paper European Automotive Laser Applications, Automotive Circle Conference, Bad Nauheim, February 14-15, 2017

D. Meinhard, V. Reitz, S. Ruck, H. Riegel, V. Knoblauch, Vergleich von IR- und UV-laserbasierten Vorbehandlungsmethoden zur Festigkeitssteigerung hybrider CFK/Al Fraternities and sororities/clubs, Leichtbau BW, 4th Technologietag Hybrider Leichtbau, Stuttgart, May 30-31, 2017

V. Reitz, D. Meinhard, S.Ruck, H. Riegel,V. Knoblauch, A comparison of IR- and UV-laser pretreatment to increase the bonding strength of adhesively joined aluminum/CFRP components, Composites Part A: Applied Science and Manufacturing, Volume 96, May 2017, Pages 18-27, DOI: 10.1016/j.compositesa.2017.02.014

M. Schweizer, D. Meinhard, S. Ruck, H. Riegel, V. Knoblauch, Adhesive bonding of CFRP: a comparison of different surface pre-treatment strategies and their effect on the bonding shear strength, Journal of Adhesion Science and Technology, April 2017, DOI: 10.1080/01694243.2017.1310695

H. Riegel, E. Hering, Laser in der Materialbearbeitung, pp. 450-470 in Optik für Ingenieure und Naturwissenschaftler - Grundlagen und Anwendungen by E. Hering, R. Martin (eds.), Hanser Verlag, Munich, 2017

M. Hofele, J.Schanz, B. Burzic, S. Lutz, M. Merkel, H. Riegel, Laser based post processing of additive manufactured metal parts, Laser in Manufacturing Conference (LIM), Munich, 2017

V.Reitz, D.Meinhard, S.Ruck, V. Knoblauch, H. Riegel, A comparison of IR- and UV-laser pretreatment to increase the bonding strength of adhesively joined Aluminum/CFRP components, Laser in Manufacturing Conference (LIM), Munich, 2017

M. Hofele, J.Schanz, S.Ruck, T.Schubert, G.Schneider, M. Merkel, H. Riegel, Metallurgical investigation of laser based post processing of additive manufactured aluminum parts, DGM Metallographie Tagung Aalen, 2017

M. Hofele, J. Schanz, S. Ruck, T. Schubert, G. Schneider, M. Merkel, H. Riegel: "Metallurgical Investigation of laser based post processing of additive manufactured aluminum parts" in: Sonderbände der Praktischen Metallographie zur 51. Metallographietagung, 2017

B. Kübler, L. Neumann, G. Schön, B. Burzic, H. Riegel, L. Kallien, S. Schuhmacher, Non-destructive testing of hybrid joining parts: Preliminary work, DGM Metallography conference; meeting Aalen, 2017

A.King, G. Ketzer-Raichle, A.Kopp, T.Grubesa, M.Hofele, G.Schneider, E.Kalhöfer, H. Riegel, Laser hardening of C45E from a materials science perspective, Jahrbuch der Oberflächentechnik 2016, Leuze Verlag, Bad Saulgau, 2016, ISBN 978-3-87480-295-6, page 33 - 40

J. Schanz, M. Hofele, l. Hitzler, M. Merkel, H. Riegel, Laser polishing of additive manufactured AlSi10Mg parts with an oscillating laser beam, Machining, Joining and Modifications of Advanced Materials, Advanced Structured Materials 61, Springer, Singapore 2016, DOI: 10.1007/978-981-10-1082-8

M. Herden, T. Sube, H. Riegel, T. Sörgel, B. Hader and J. Albrecht, Multicomponent metal surfaces with structures on micrometer scale, page 96- Jahrbuch Oberflächentechnik 2015, Leuze-Verlag, Bad Saulgau, 2015, ISBN 978-3-87480-292-5

C. Weiß, G. Ketzer-Raichle, M. Hofele, E. Reiter, G. Schneider, W. Kleppmann, H. Riegel, Laserpolieren von Vergütungsstahl mit Linienoptik, page 96, Jahrbuch Oberflächentechnik 2015, Leuze-Verlag, Bad Saulgau, 2015, ISBN: 978-3-87480-292-5

J. Schmidt, R. Scholz, H. Riegel, Laserpolishing of aluminum by remelting with high energy pulses, Mat.-wiss. u. Werkstofftech. 46, No.6 2015, DOI: 10.1002/mawe.201500318

Schillig, R., Stock, T., Schmeiler, M., Riegel, H. & Müller, E., 2015. Energy efficiency of laser machining processes. Lasers - Development and industrial application. Issue No. 4, 29th year, Nov./Dec. 2015, b-Quadrat Verlag

H. Riegel, M. Merkel, A. Öchsner, Laser beam drilling of metal-based composites, in High-Power Laser Materials Processing, Proc. of SPIE Vol. 8963 (2014), 7 pages

H. Riegel, M. Merkel, A. Öchsner, Laser drilling of hollow sphere structures, Mat.-wiss. u. Werkstofftech. 43, No. 5 (2014) pages 406-413, DOI: 10.1002/mawe.201400239,

S. Stein, R. Börret, A. Kelm, E. Reiter, G. Schneider, H. Riegel, Hardening and Roughness Reduction of Carbon Steel by Laser Polishing in Design and Computation of Modern Engineering Materials, Advanced Structured Materials 54, Springer, Berlin (2014), pages 411-419, DOI: 10.1007/978-3-319-07383-5_29

M. Araújo, M. Merkel, H. Riegel, A. Öchsner, On the numerical simulation of laser beam cutting of hollow sphere structures, Mat.-wiss. u. Werkstofftech. 44, No. 5 (2013)

H. Riegel, M. Merkel, Cutting of Metallic Hollow Sphere Structures, talk; lecture Stuttgarter-Laser-Tage (2013)

H. Riegel, J. Fruhstuck, M. Merkel, R. Winkler, A. Öchsner, On the Laser Beam Cutting of Metallic Hollow Sphere Structures, in High-Power Laser Materials Processing, Proc. of SPIE Vol. 8603 86030V-1 (2013)

H. Riegel, M. Merkel, A. Öchsner, M. Araújo , R. Thiede, J. Fruhstuck, Laser beam welded sandwich structures with hollow sphere core, Mat.-wiss. u. Werkstofftech. 44, No. 5 (2013)

A. Bäuerle, M. Merkel, H. Riegel, A. Öchsner, Numerical Simulation of Laser Drilling of Hollow Sphere Structures, Conference ACE-X2013, Madrid, Book of Abstracts, 63 (2013) page 64

H. Riegel, M. Merkel, Laser material processing of composite materials using the example of metallic hollow sphere structures, Photonik, 50, 6, (2013) page 50-53, ISSN 1432-9778

H. Riegel, M. Merkel, A. Öchsner, Laser beam cutting of metallic hollow sphere structures, Mat.-wiss. u. Werkstofftech. 43, No. 5 (2012)

H. Riegel, K. Kallien: "Laserstrahlschweißen von Aluminiumdruckguss", Aalener Gießerei Colloquium. May 4-5, 2011, Aalen University of Applied Sciences.