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Strengthening Induced by MagnetoChemical Transition in Al-Doped Fe-Cr-Co-Ni High-Entropy Alloys
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.ORCID iD: 0000-0001-7724-8299
Sandvik Coromant R&D, S-12680 Stockholm, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics. Wigner Res Ctr Phys, Inst Solid State Phys & Opt, H-1525 Budapest, Hungary.;Uppsala Univ, Div Mat Theory, Dept Phys & Astron, SE-75120 Uppsala, Sweden..
2018 (English)In: Physical Review Applied, E-ISSN 2331-7019, Vol. 10, no 6, article id 064033Article in journal (Refereed) Published
Abstract [en]

Alloys with adjustable mechanical performance are of fundamental interest in material designs. Here, we investigate the magnetic- and chemical-ordering behavior of the ferromagnetic Fe-Cr-Co-Ni-Al-x (1 <= x <= 2.5) high-entropy alloys with the help of first-principle alloy theory. The lattice constants and the single- and polycrystalline elastic parameters for partially ordered and random structures are considered. In contrast to the trend found for the completely disordered phase, we demonstrate that ordering driven primarily by Al results in an enhanced Young's modulus, especially at high-Al concentrations, which is in line with the observed increase of the hardness for systems with a body-centered-cubic underlying lattice. The results suggest that outstanding strength and ductility can be realized by proper control of the ordering level in single- and multiphase high-entropy alloys.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 10, no 6, article id 064033
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Other Materials Engineering
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URN: urn:nbn:se:kth:diva-240720DOI: 10.1103/PhysRevApplied.10.064033ISI: 000452966700003Scopus ID: 2-s2.0-85058673422OAI: oai:DiVA.org:kth-240720DiVA, id: diva2:1277082
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QC 20190109

Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-09Bibliographically approved

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Huang, ShuoLi, Wei

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