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  Combined Al and C alloying enables mechanism-oriented design of multi-principal element alloys: Ab initio calculations and experiments

Kies, F., Ikeda, Y., Ewald, S., Schleifenbaum, J. H., Hallstedt, B., Körmann, F., et al. (2020). Combined Al and C alloying enables mechanism-oriented design of multi-principal element alloys: Ab initio calculations and experiments. Scripta Materialia, 178, 366-371. doi:10.1016/j.scriptamat.2019.12.004.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-63B9-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-63BA-8
Genre: Journal Article

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 Creators:
Kies, Fabian1, Author              
Ikeda, Yuji2, 3, Author              
Ewald, Simon4, Author              
Schleifenbaum, Johannes H.4, 5, Author              
Hallstedt, Bengt6, Author              
Körmann, Fritz7, 8, Author              
Haase, Christian1, Author              
Affiliations:
1Steel Institute (IEHK), RWTH Aachen University, 52072 Aachen, Germany, ou_persistent22              
2Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863337              
3Institute of Materials Science, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, ou_persistent22              
4Digital Additive Production (DAP), RWTH Aachen University, 52074 Aachen, Germany, ou_persistent22              
5Fraunhofer Institute for Laser Technology (ILT), 52074 Aachen, Germany, ou_persistent22              
6IWM, RWTH Aachen University, Aachen, Germany, ou_persistent22              
7Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
8Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands, ou_persistent22              

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Free keywords: 3D printers; Additives; Alloying elements; Calculations; Cobalt alloys; Computation theory; Density (specific gravity); Density functional theory; Design for testability; High-entropy alloys; Iron alloys; Manganese alloys; Mechanical properties; Tensile testing; Thermodynamics, Ab initio calculations; Computational thermodynamics; Experimental verification; Microstructure analysis; Stacking fault energies; Toolsets; Twinning-induced plasticities, Aluminum alloys
 Abstract: Density functional theory (DFT) calculations were performed on AlxCyCoFeMnNi multi-principal element alloys (MPEAs) to understand the influence of Al and C on the stacking-fault energy (SFE). C addition to CoFeMnNi resulted in increased SFE, while it decreased in Al-alloyed CoFeMnNi. For experimental verification, Al0.26CyCoFeMnNi with 0, 1.37 and 2.70 at C were designed by computational thermodynamics, produced by additive manufacturing (AM) and characterized by tensile tests and microstructure analysis. Twinning-induced plasticity (TWIP) was enhanced with increased C, which confirmed a decreased SFE. The combination of these methods provides a promising toolset for mechanism-oriented design of MPEAs with advanced mechanical properties. © 2019 Acta Materialia Inc.

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Language(s): eng - English
 Dates: 2020-03-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.scriptamat.2019.12.004
 Degree: -

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Project name : F.Ki., Y.I., B.H., F.Kö. and C.H. would like to thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for the support of the depicted research within the priority programme 2006 “CCA – HEA” (project-IDs 388166069 and 388544551 ). F.Ki., S.E., J.H.S. and C.H. also gratefully acknowledge the support by the Hans Hermann Voss-Stiftung within the RWTH Aachen Seed-Fund project OPSF406 (G:(DE-82)ZUK2-SF-OPSF406). S.E., J.H.S. and C.H. also gratefully acknowledge the funding of the DFG under Germany’s Excellence Strategy - EXC-2023 Internet of Production - 390621612 .
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Title: Scripta Materialia
  Abbreviation : Scripta Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam : Elsevier B. V.
Pages: - Volume / Issue: 178 Sequence Number: - Start / End Page: 366 - 371 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506