Journal
ULTRAMICROSCOPY
Volume 111, Issue 6, Pages 619-622Publisher
ELSEVIER
DOI: 10.1016/j.ultramic.2010.12.001
Keywords
High entropy alloys; TEM analysis; 3D-AP measurements; Magnetisation
Categories
Funding
- German Research Foundation (DFG) [WA 1378/15-1]
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Splat-quenched, as-cast and aged (2 h at 600 degrees C after casting) AlCoCrCuFeNi high entropy alloys were investigated by means of transmission electron microscopy and three-dimensional atom probe (3D-AP). 3D-AP revealed anti-correlated fluctuations of the Cr and Fe-Co compositions in Cr-Fe-Co-rich regions of the as-cast alloy. The ferromagnetic behavior of AlCoCrCuFeNi high entropy alloy was correlated with the decomposition of the Cr-Fe-Co-rich regions into ferromagnetic Fe-Co-rich and antiferromagnetic Cr-rich domains, the size of which was determined by statistical analysis of 3D-AP data. The splat-quenched alloy showed a softer magnetic behavior as compared to the as-cast and aged alloys. The aged alloy possessed a higher saturation magnetization and coercivity as compared to the as-cast alloy. (C) 2010 Elsevier B.V. All rights reserved.
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