Effects of phase composition and elemental partitioning on soft magnetic properties of AlFeCoCrMn high entropy alloys

Cited 5 time in webofscience Cited 0 time in scopus
  • Hit : 138
  • Download : 0
We investigated the microstructure evolution, phase formation, and soft magnetic behavior of as-cast Al-0.1(Fe1+xCoCr1-xMn)(0.9) (x = 0, 0.2, 0.4, 0.6, 0.8) high entropy alloys using combined atom probe tomography, electron microscopy, and ab initio density functional theory calculations. Up to x = 0.6, the alloys consisted of a disordered BCC matrix and nano-scale ordered B2 precipitates, where for x = 0.8 a small fraction of a FCC phase (18.3 vol %) was formed. Using the structural information from electron microscopy and chemical information from atom probe tomography as inputs for density functional theory calculations, we determined the electronic density of states and magnetic moments associated with each alloying element. Fe and Co showed ferromagnetic behavior in all three phases, whereas Cr exhibited antiferromagnetic coupling with Fe and Co. Mn showed a strongly reduced net magnetic moment in FCC as compared to BCC and B2. Thus, substituting a maximum amount 13.5 at.% of Cr by Fe without forming the FCC phase, i.e. the Al-0.1(Fe1+xCoCr1-xMn)(0.9) alloy, resulted in the highest saturation magnetization (135 Am-2/kg) among the alloys studied in this work. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-06
Language
English
Article Type
Article
Citation

ACTA MATERIALIA, v.171, pp.31 - 39

ISSN
1359-6454
DOI
10.1016/j.actamat.2019.04.007
URI
http://hdl.handle.net/10203/262796
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0