Zentrum für virtuelle Produktentwicklung (ZVP)

Laufende Projekte

Abgeschlossene Projekte

Papers

2024

M. Kul; B. Akgül; Y.Z. Karabay; L. Hitzler; E. Sert; M. Merkel, Minimum and Stable Coefficient of Thermal Expansion by Three-Step Heat Treatment of Invar 36. Crystals 2024, 14, 1097, 2024.

DOI

D. Grützner, G. Schultheiß, C. Ocker, S. Becker, M. Merkel, F. Czwielong, Die Rolle poröser Strukturen bei der Schallreduzierung von Axialventilatoren, DAGA 2024 – 50. Jahrestagung für Akustik, 1183-1186, 2024.

ISBN

J. Kortsch-Banzhaf, S. Höing, L. Kallien, M. Merkel, Wärmeleitfähigkeit in Abhängigkeit der Zusammensetzung einer AlSi10MnMg-Sekundärlegierung, Materialwiss. Werkstofftech, Vol. 55, Issue 6, Seiten: 910–916, 2024. 

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F. Ferrano, M. Fateri, M. Merkel, J. Hertel, Simulating Elastoplastic and Anisotropic Behavior in Thermoplastic Additively Manufactured Components: An Application-Oriented Modeling Approach. Polymers 16, 1234, 2024. 

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G. Schultheiß, B. Heine, M, Merkel, Characterization of flexural fatigue behaviour of additively manufactured (PBF–LB) gyroid structures, Progress in Additive Manufacturing. 2024

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J. Kortsch-Banzhaf, G. Schultheis, M. Merkel, Investigation of the Thermophysical Properties of Porous Steel Components made by Selective Laser Melting, Lecture Notes on Advanced Structured Materials 2, Volume 203, Springer Nature. 2024

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E. Sert, J. Köppel, M. Butze, F. Brockmann, M. Merkel, A. Öchsner, Determination of the Fatigue Behaviour of Laser Powder-Bed Fused AlSi10Mg Specimens Using Surface and Heat Treatments. In: Altenbach, H., Hitzler, L., Johlitz, M., Merkel, M., Öchsner, A. (eds) Lectures Notes on Advanced Structured Materials 2. Advanced Structured Materials, vol 203. Springer, Cham. 2024,

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J. Kortsch-Banzhaf, S. SharadaRamakrishna, C. Rockinger, M. Merkel, Thermal Anisotropy Using the Hot Disk Method, Collaborative Research Advancing Engineering Solutions for Real-World Challenges, Seite 192-194. 2024

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M. Kul, B. Akgül, Y.Z. Karabay, L. Hitzler, E. Sert, M. Merkel, Minimum and Stable Coefficient of Thermal Expansion by Three-Step Heat Treatment of Invar 36. Crystals 14, 1097, 2024. 

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2023

F. Czwielong, J. Benz, C. Ocker, A. Renz, M. Sedlmajer, M. Merkel, S. Becker, On the Aeroacoustic Properties of a Prandtl-Fan, Proceedings of the ASME Turbo Expo, 6, V006T10A007, 15 Seiten. 2023.

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J. Sykora; M. Sedlmajer; T. Schubert; M. Merkel; L. Kroft; L. Kucerova; J. Rehor, Additive Manufacturing of WC-Co Specimens with Internal Channels. Materials, 16, 3907. 2023

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D. Schuhmann, M. Merkel, D.K. Harrison, Highly efficient and resource-saving function-integrated additively manufactured components for the mobility of tomorrow. Quality Analysis of Additively Manufactured Metals, Pages 781-813, 2023.

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2022

M. Merkel, M. Rupp, M. Sedlmajer, Digital Product Development by Additive Manufacturing, Lectures Notes on Advanced Structured Materials, Advanced Structured Materials, vol 153. Springer, pp 45–52, 2022.

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D. Schuhmann, Grithen Pinto, M. Merkel, D.K. Harrison, Study on additive manufacturing of metal components for mobility in the area of after-sales with spare and performance parts. Vehicles, 4(4), 957-977, 2022.

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D. Schuhmann, C. Rockinger, M. Merkel, D.K. Harrison, A study on additive manufacturing for Electromobility. World Electric Vehicle Journal, 18(8), 154, 2022.

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D. Schuhmann, M. Rupp, M. Merkel, D. K. Harrison, Additive vs. Conventional Manufacturing of Metal Components: Selection of the Manufacturing Process Using the AHP Method. Processes 10 (8), 1617, 2022.

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L. Hitzler, M.Z. Shahul Hameed, A. Kah, M. Merkel, E. Werner, Thermal expansion and temperature-dependent Young’s modulus of Invar fabricated via laser powder-bed fusion.
Progress in Additive Manufacturing 7 (3), 463-470, 2022.

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M. Rupp, R. Klink, M. Merkel, D. K. Harrison, Additive Manufacturing in the Scope of Industry 4.0: A Review on Energy Consumption and Building Time Estimation for Laser Powder Bed-Fusion Processes. Proceedings of VI International Scientific Conference Summer Session Industry 4.0, 7 (4), 118 -122, 2022.

ISSN

J. Tomas, M. Merkel, H. Altenbach, On the Optical Thermography in Selective Laser Melting Process. Mech. Solids 57, 597–603 (2022).

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B. Heine, A. Kah, M. Sedlmajer, C. Ocker, M. Merkel, Impact of corrosion on mechanical properties of additively manufactured Invar 36. Material Science and Engineering Technology, 53 (3), 316–327, 2022.

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P. Mindermann, R. Müllner, E. Dieringer, C. Ocker, R. Klink, M. Merkel, G. T. Gresser, Design of Fiber-Composite/Metal–Hybrid Structures Made by Multi-Stage Coreless Filament Winding. Applied Sciences, 12 (5), 2296, 2022.

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M. Rupp, M. Buck, R. Klink, M. Merkel, D. K. Harrison, Additive manufacturing of steel for digital spare parts - A perspective on carbon emissions for decentral production, Cleaner Environmental Systems, 4, 100069, 2022

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C. Ocker, E. Blumendeller, P. Berlinger, W. Pannert, A. Clifton, Localization of wind turbine noise using a microphone array in wind tunnel measurements,

Wind Energy, 25(1), 149- 167, 2022.

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2021:

C. Ocker, W. Pannert, Three-dimensional acoustic energy flow from rotating sound sources. Acta Acustica, 5(48),1-9, 2021.

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F. Köhn, M. Sedlmajer, J. Albrecht, M. Merkel, Additive Manufacturing of Tungsten Carbide Surfaces with Extreme Wear Resistivity; Coatings, 11(10), 1240;

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C. Ocker, F. Czwielong, F. Krömer, P. Chaitanya, W. Pannert and S. Becker, Schallquellenlokalisierung an geschlitzten Axialventilatoren mit rotierendem Beamforming, Proceedings of DAGA 2021 - 47. Jahrestagung für Akustik, 769-772, 2021.

C. Ocker, F. Czwielong, T. F. Geyer, M. Merkel and S. Becker, Strukturierte Porosität zur Lärmminderung von Axialventilatoren. Proceedings of DAGA 2021 - 47. Jahrestagung für Akustik, 1512-1515, 2021.

J. Krotsch, C. Ocker and M. Delija, Ringförmiges Mikrofonarray zur Charakterisierung der Rotorstrukturschwingungen von Außenläufermotoren. Proceedings of DAGA 2021 - 47. Jahrestagung für Akustik, 765-768, 2021.

M. Rupp, M. Merkel, Direct Digital Manufacturing - The role of cost accounting for online hubs to access industry 4.0. Proceedings of VI International Scientific Conference Summer Session Industry 4.0, 107 -110, 2021.
ISSN

C. Ocker, T. F. Geyer, F. Czwielong, F. Krömer, W. Pannert, M. Merkel, S. Becker, Permeable Leading Edges for Airfoil and Fan Noise Reduction in Disturbed Inflow. AIAA Journal, 59(12), 4969-4986, 2021.

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C. Ocker, F. Czwielong, T. F. Geyer, C. Paruchuri, M. Merkel, S. Becker, Permeable Structures for Leading Edge Noise Reduction. Proceedings of 27th AIAA/CEAS Aeronautics Conference, AIAA 2021-2192, 20 pages, 2021.

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D. Schuhmann, M. Merkel, S. Reusch, D.K. Harrison, Development of a hybrid electric powertrain for non-road mobile machinery by means of application adapted driving profiles. 8. Fachtagung Hybride und energieeffiziente Antriebe für mobile Arbeitsmaschinen. 23 Februar 2021. P 147-166

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M. Rupp, M. Schneckenburger, M. Merkel, R. Börret, D. K. Harrison, Industry 4.0: A Technological-Oriented Definition Based on Bibliometric Analysis and Literature Review. J. Open Innov. Technol. Mark. Complex., 7(1), 68, 2021.

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J. Tomas, A. Öchsner, M. Merkel, Experimental Study on Thermal Properties of Hollow Sphere Structures. Defect and Diffusion Forum, 407(4), 185-191, 2021

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2020:

D. Schuhmann, M. Merkel, D.K. Harrison, Made to measure. The magazine for industrial vehicle technology, design & engineering, Ausgabe November 2020, 36-40, 2020

J. Tomas, L. Hitzler, M. Köller, J. von Kobylinski, M. Sedlmajer, E. Werner, M. Merkel, The Dimensional Accuracy of Thin-Walled Parts Manufactured by Laser-Powder Bed Fusion Process. J. Manuf. Mater. Process. 2020, 4(3), 91-103, 2020

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S. Hafenstein, L. Hitzler, E. Sert, A. Öchsner, M. Merkel, E. Werner, Critical Quenching Rates After Solution Annealing: Peculiarities of Aluminum–Silicon Alloys Fabricated by Laser Powder-Bed Fusion. TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. Springer International Publishing, 2020

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L. Hitzler, E. Sert, E. Schuch, A. Öchsner, M. Merkel, B. Heine, E. Werner, Fracture toughness of L-PBF fabricated aluminium–silicon: a quantitative study on the role of crack growth direction with respect to layering. Progress in Additive Manufacturing, 2020

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L. Hitzler, S. Hafenstein, F. Mendez Martin, H. Clemens, E. Sert, A. Öchsner, M. Merkel, E. Werner, Heat Treatments and Critical Quenching Rates in Additively Manufactured Al–Si–Mg Alloys. Materials 13 (3), 720-737, 2020

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M. Steinhauser, E. Sert, L. Hitzler, A. Öchsner, M. Merkel, Fatigue Behavior of the Additively Manufactured Tool Steel H13 after Surface Treatment using Different Post-Processing Methods. Practical Metallography, 57 (3), 140-167, 2020
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C. Ocker, T. F. Geyer, F. Czwielong, F. Krömer, M. Merkel, S. Becker, Experimental Investigation of the Impact of 3D-Metal-Printed Perforated Leading Edges on Airfoil and Axial Fan Noise. Proceedings of 26th AIAA/CEAS Aeronautics Conference, AIAA 2020-2529, 19 pages 2020.

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H. Baumgartl, J. Tomas, R, Büttner, M. Merkel, A deep learning-based model for defect detection in laser-powder bed fusion using in-situ thermographic monitoring. Progress in Additive Manufacturing, 5, 277-285, 2020.

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E. Sert, L. Hitzler, S. Hafenstein, M. Merkel, E. Werner, A. Öchsner, Tensile and compressive behaviour of additively manufactured AlSi10Mg samples. Progress in Additive Manufacturing 5, 305-313, 2020.

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E. Sert, L. Hitzler, M. Merkel, E. Werner, A. Öchsner, Additive manufacturing of AlSi10Mg samples using the selective laser melting technique: correlation between tensile and torsion behavior. Materialwissenschaft und Werkstofftechnik 51 (7), 856-861, 2020.

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2019:

E. Sert, L. Hitzler, B. Heine, M. Merkel, E. Werner, A. Öchsner, Influence of the Heat Treatment on the Microstructure and Hardness of Additively Manufactured AlSi10Mg Samples. Pract. Metallogr., Vol. 56, No. 2, 91-105, 2019

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E. Sert, E. Schuch, A. Öchsner, L. Hitzler, E. Werner, M. Merkel, Tensile strength performance with determination of the Poisson‘s ratio of additively manufactured AlSi10Mg samples. Materialwiss. Werkstofftech., 50, 539-545, 2019

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S. Heilgeist, B. Heine, M. Merkel, L. Hitzler, Z. Javanbakht, A. Öchsner, The influence of post-heat treatments on the tensile strength and surface hardness of selectively laser-melted AlSi10Mg. Materialwiss. Werkstofftech., 50, 546-552, 2019

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L. Hitzler, J. Hirsch, J. Tomas, M. Merkel, W. Hall, A. Öchsner, In-plane Anisotropy of Selective Laser Melted Stainless Steel: The Importance of the Rotation Angle Increment and the Limitation Window. Proc. Inst. Mech. Eng., Part L, 233(7), 1419-1428, 2019

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L. Hitzler, E. Sert, M. Merkel, A. Öchsner, E. Werner, Fracture Toughness and Fatigue Strength of Selective Laser Melted Aluminium–Silicon: An Overview. The Minerals, Metals & Materials Society (ed.), TMS 2019 148th, 407-412, 2019

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2018:

J.P. Körperich, M. Merkel, Thermographic analysis of the building height impact on the properties of tool steel in selective laser beam melting. Materials Science & Engineering Technology, 49 (5), 689-695, 2018

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L. Hitzler, M. Merkel, W. Hall, A. Öchsner, A Review of Metal Fabricated with Powder-Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector. Advanced Engineering Materials, 20 (5), 1-28, 2018.

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L. Hitzler, N. Schoch, B. Heine, M. Merkel, W. Wall, A. Öchsner, Compressive behaviour of additively manufactured AlSi10Mg, Materials Science & Engineering Technology, 49, 683 - 688, 2018.

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E. Sert, L. Hitzler, M. Merkel, A. Öchsner, Development of additively manufactured, topology-optimized interface elements uniting an electrical drivetrain with a conventional chassis. Materials Science & Engineering Technology, 49, 674 - 682, 2018.

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L. Hitzler, J. Hirsch, J. Tomas, M. Merkel, W. Hall, A. Öchsner, In-plane Anisotropy of Selective Laser Melted Stainless Steel: The Importance of the Rotation Angle Increment and the Limitation Window. Journal of Materials: Design and Applications, 2018.

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L. Hitzler, F. Alifui-Segbaya, P. Williams, B. Heine, M. Heitzmann, W. Hall, M Merkel., A. Öchsner, Additive Manufacturing of Cobalt-Based Dental Alloys: Analysis of Microstructure and Physicomechanical Properties, Advances in Materials Science and Engineering, vol. 2018,

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2017:

L. Hitzler, P. Williams, M. Merkel, H. Wayne, A. Öchsner, Correlation between the Energy Input and the Microstructure of Additively Manufactured Cobalt-Chromium, Defect and Diffusion Forum, 379, 157 - 165, 2017.

https://doi.org/10.4028/www.scientific.net/DDF.379.157 

L. Hitzler, J. Hirsch, M. Merkel, A. Öchsner, Thermal environment and inclination angle dependencies on the surface quality of selective laser melted 316L steel, Defect and Diffusion Forum, 372, 202 - 207, 2017.

https://doi.org/10.4028/www.scientific.net/DDF.372.202 

L. Hitzler, J. Hirsch, M. Merkel, W. Hall, A. Öchsner, Position dependent surface quality in Selective Laser Melting. Materials Science & Engineering Technology, 48, 327 - 334, 2017.

https://doi.org/10.1002/mawe.201600742 

L. Hitzler, J. Hirsch, B. Heine, M. Merkel, W. Hall, A. Öchsner, On the Anisotropic Mechanical Properties of Selective Laster-Melted Stainless Steel, Materials, 10, 1136, 2017.

https://doi.org/10.3390/ma10101136 

L. Hitzler, J. Hirsch, J. Schanz, B. Heine, M. Merkel, W. Hall, A. Öchsner, Fracture toughness of selective laser melted AlSi10Mg, Journal of Materials: Design and Applications, 230, 789 – 798, 2017.

https://doi.org/10.1177/1464420716687337 

L. Hitzler, C. Janousch, J. Schanz, M. Merkel, B. Heine, F. Mack, W. Hall, A. Öchsner, Direction and location dependency of selective laser melted AlSi10Mg specimens, Journal of Materials Processing Technology, 243, 48 - 61, 2017. https://doi.org/10.1016/j.jmatprotec.2016.11.029 

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, Materials Science & Engineering Technology, 48, 463 - 476, 2017.

https://doi.org/10.1002/mawe.201700039 

L. Hitzler, J. Hirsch, M. Merkel, W. Hall, A. Öchsner, Position dependent surface quality in selective laser melting, Materials Science & Engineering Technology, 48, 327 - 334, 2017.

https://doi.org/10.1002/mawe.201600742 

2016:

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, 61,159 - 169, 2016.

https://doi.org/10.1007/978-981-10-1082-8_16 

A. Liebisch, M. Merkel, On the numerical simulation of the thermal behavior during the selective laser melting process, Materials Science & Engineering Technology, 47, 521 - 529, 2016. https://doi.org/10.1002/mawe.201600528 

C. Janousch, R. Winkler, M. Merkel, H. Altenbach, A. Öchsner, On the isotropic and anisotropic thermal conductivity of metallic hollow sphere structures, Journal of Materials: Design and Applications, 230, 789 - 798, 2016. https://doi.org/10.1177/1464420715602726 

L. Hitzler, C. Janousch, J. Schanz, M. Merkel, F. Mack, A. Öchsner, Non-destructive evaluation of AlSi10Mg prismatic samples generated by selective laser melting: Influence of manufacturing conditions, Materials Science & Engineering Technology, 47, 564 - 581, 2016.

https://doi.org/10.1002/mawe.201600532 

2015:

L. Hitzler, M. Merkel, P. Freytag, Design of a subframe to integrate an electric drivetrain in existing vehicles, Materials Science & Engineering Technology, 46, 454 - 461, 2015.

https://doi.org/10.1002/mawe.201500421 

Conferences:

Josef Tomas, Christof Ocker, Markus Merkel: Resulting Anisotropic Properties of Printed Aluminum Alloy Parts without Rotation Angle Implementation in Manufacturing Process

Josef Tomas, Adrian Kah, Thomas Obermayer, Leonhard Hitzler, Burkhard Heine, Edward Werner, Markus Merkel: On the Mechanical and Thermal Properties of Invar36 Processed by Laser Powder Bed Fusion

D. Schuhmann, S. Reusch, M. Merkel, D.K. Harrison, Modular and scalable electric drive platform for non-road mobile machinery, Tagungsband 12th Expert Forum Electric Vehicle Drives 15 – 17 September, 2020 - online

J. Tomas, M. Merkel, H. Altenbach, On the optical thermography in selective laser melting process. (Keynote), IUTAM Symposium on Mechanical Design and Analysis for AM Technologies.Moscow, Russia, August 20 – 25, 2018

M. Merkel, T. Schubert, T. Bernthaler, J. Tomas, G. Schneider, D. Sellmer, Laser sintering of tungsten carbide cutter shafts with integrated cooling channels, Proceedings of the 3rd International Conferences on Progress in Additive Manufacturing, 297 - 302, 2018.

DOI

A. Gütlein, Dipl.-Ing.; F. Weber, Dipl.-Wirtschafts-Chemiker; T. Schubert, M.Sc.; Dr. T. Bernthaler, Dipl.-Ing.; M. Sedlmajer, M.Eng.; Prof. Dr.-Ing. M. Merkel, Herstellung von hybriden Gleitringen mittels additivem Verfahren, Conference report: 20th International Sealing Conference ISC, Volume 2018,

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A. Gütlein, F. Weber, A. Thiele, M. Merkel, M. Sedlmajer, D. Vogt, Cartridge seals with parts produced with laser beam melting, Conference report: 19th International Sealing Conference ICT, 2016.

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U. Berger, M. Merkel, A. Liebisch, The influence of preheating on laser beam melting, Proceedings of the 2nd International Conference on Progress in Additive Manufacturing (Pro-AM 2016), Singapore, 306-311, 2016.

https://dr.ntu.edu.sg/handle/10220/41809

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