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  Role of magnetic ordering for the design of quinary TWIP-TRIP high entropy alloys

Wu, X., Li, Z., Rao, Z., Ikeda, Y., Dutta, B., Körmann, F., et al. (2020). Role of magnetic ordering for the design of quinary TWIP-TRIP high entropy alloys. Physical Review Materials, 4(3): 033601. doi:10.1103/PhysRevMaterials.4.033601.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-921F-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-922A-6
Genre: Journal Article

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PhysRevMaterials.4.033601.pdf (Supplementary material), 13MB
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 Creators:
Wu, Xiaoxiang1, Author              
Li, Zhiming1, 2, Author              
Rao, Ziyuan1, Author              
Ikeda, Yuji3, Author              
Dutta, Biswanath4, Author              
Körmann, Fritz5, 6, Author              
Neugebauer, Jörg3, Author              
Raabe, Dierk7, Author              
Affiliations:
1High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672              
2School of Materials Science and Engineering, Central South University, Changsha 410083, China, ou_persistent22              
3Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863337              
4Materials Science and Engineering, Delft University of Technology, Mekeleweg 2, 2628 CD Delft, The Netherlands, ou_persistent22              
5Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
6Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands, ou_persistent22              
7Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              

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Free keywords: Antiferromagnetism; Calculations; Deformation; Density functional theory; Entropy; High-entropy alloys; Manganese compounds; Plasticity, Ab initio calculations; Ab initio simulations; Deformation mechanism; Experimental validations; Mechanical property evaluation; Stacking fault energies; Transformation induced plasticity; Twinning-induced plasticities, Manganese alloys
 Abstract: We reveal the impact of magnetic ordering on stacking fault energy (SFE) and its influence on the deformation mechanisms and mechanical properties in a class of nonequiatomic quinary Mn-containing compositional complex alloys or high entropy alloys (HEAs). By combining ab initio simulation and experimental validation, we demonstrate magnetic ordering as an important factor in the activation and transition of deformation modes from planar dislocation slip to TWIP (twinning-induced plasticity) and/or TRIP (transformation-induced plasticity). A wide compositional space of Cr20MnxFeyCo20Niz(x+y+z=60, at. ) was probed by density-functional theory calculations to search for potential alloys displaying the TWIP/TRIP effects. Three selected promising HEA compositions with varying Mn concentrations were metallurgically synthesized, processed, and probed for microstructure, deformation mechanism, and mechanical property evaluation. The differences in the deformation modes of the probed HEAs are interpreted in terms of the computed SFEs and their dependence on the predicted magnetic state, as revealed by ab initio calculations and validated by explicit magnetic measurements. It is found that the Mn content plays a key role in the stabilization of antiferromagnetic configurations which strongly impact the SFEs and eventually lead to the prevalent deformation behavior. © 2020 authors. Published by the American Physical Society.

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Language(s): eng - English
 Dates: 2020-03-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevMaterials.4.033601
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Project name : Financial support of the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) within the Priority Programme 2006 (Compositionally Complex Alloys-High Entropy Alloys) and NWO/STW (VIDI Grant No. 15707) is acknowledged. The authors would like to gratefully thank M. Nellessen, K. Angenendt, M. Adamek, and B. Breitbach at the Max-Planck-lnstitut fur Eisenforschung for the kind support. The authors also thank Dr. D. Ponge and Dr. J. Su for intense discussion.
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Title: Physical Review Materials
  Abbreviation : Phys. Rev. Mat.
Source Genre: Journal
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Publ. Info: College Park, MD : American Physical Society
Pages: 14 Volume / Issue: 4 (3) Sequence Number: 033601 Start / End Page: - Identifier: ISSN: 2475-9953
CoNE: https://pure.mpg.de/cone/journals/resource/2475-9953