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  Ultrastrong and Ductile Soft Magnetic High-Entropy Alloys via Coherent Ordered Nanoprecipitates

Han, L., Rao, Z., Souza Filho, I. R., Maccari, F., Wei, Y., Wu, G., et al. (2021). Ultrastrong and Ductile Soft Magnetic High-Entropy Alloys via Coherent Ordered Nanoprecipitates. Advanced Materials, 33(37): 2102139. doi:10.1002/adma.202102139.

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Ultrastrong and Ductile Soft Magnetic High‐Entropy Alloys via Coherent Ordered Nanoprecipitates.pdf (Publisher version), 5MB
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Ultrastrong and Ductile Soft Magnetic High‐Entropy Alloys via Coherent Ordered Nanoprecipitates.pdf
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2021
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The Authors. Advanced Materials published by Wiley-VCH GmbH.

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 Creators:
Han, Liuliu1, 2, Author              
Rao, Ziyuan2, 3, Author              
Souza Filho, Isnaldi Rodrigues4, Author              
Maccari, Fernando5, Author              
Wei, Ye4, 6, Author              
Wu, Ge3, Author              
Ahmadian, Ali7, Author              
Zhou, Xuyang8, Author              
Gutfleisch, Oliver2, 9, Author              
Ponge, Dirk1, Author              
Raabe, Dierk4, Author              
Li, Zhiming10, 11, Author              
Affiliations:
1Mechanism-based Alloy Design, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863383              
2De magnete - Designing Magnetism on the atomic scale, MPG Group, Interdepartmental and Partner Groups, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3260224              
3High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672              
4Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
5Functional Materials, Department of Material Science Technische Universität Darmstadt, 64287, Darmstadt, Germany, ou_persistent22              
6Hydrogen in Energy Materials, Project Groups, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3291873              
7Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863399              
8Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
9Functional Materials, Materials Science, Technical University of Darmstadt, 64287 Darmstadt, Germany, ou_persistent22              
10School of Materials Science and Engineering, Central South University, Changsha 410083, China, ou_persistent22              
11Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083 China, ou_persistent22              

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Free keywords: Aluminum alloys; Cobalt alloys; Domain walls; Entropy; High-entropy alloys; Iron alloys; Magnetic domains; Magnetic properties; Soft magnetic materials; Tantalum alloys, Face-centered cubic; Free state; Functional devices; Nanoprecipitates; Novel concept; Provide guidances; Soft magnetic properties; Soft magnetics, Precipitation (chemical)
 Abstract: The lack of strength and damage tolerance can limit the applications of conventional soft magnetic materials (SMMs), particularly in mechanically loaded functional devices. Therefore, strengthening and toughening of SMMs is critically important. However, conventional strengthening concepts usually significantly deteriorate soft magnetic properties, due to Bloch wall interactions with the defects used for hardening. Here a novel concept to overcome this dilemma is proposed, by developing bulk SMMs with excellent mechanical and attractive soft magnetic properties through coherent and ordered nanoprecipitates (<15 nm) dispersed homogeneously within a face-centered cubic matrix of a non-equiatomic CoFeNiTaAl high-entropy alloy (HEA). Compared to the alloy in precipitate-free state, the alloy variant with a large volume fraction (>42) of nanoprecipitates achieves significantly enhanced strength (≈1526 MPa) at good ductility (≈15), while the coercivity is only marginally increased (<10.7 Oe). The ordered nanoprecipitates and the resulting dynamic microband refinement in the matrix significantly strengthen the HEAs, while full coherency between the nanoprecipitates and the matrix leads at the same time to the desired insignificant pinning of the magnetic domain walls. The findings provide guidance for developing new high-performance materials with an excellent combination of mechanical and soft magnetic properties as needed for the electrification of transport and industry. © 2021 The Authors. Advanced Materials published by Wiley-VCH GmbH

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 Dates: 2021-09-16
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/adma.202102139
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 33 (37) Sequence Number: 2102139 Start / End Page: - Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855