Strengthening of Al0.3CoCrFeMnNi-based ODS high entropy alloys with incremental changes in the concentration of Y2O3

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The high-entropy alloy (HEA) composite Al0.3CoCrFeMnNi based on the face-centered-cubic (FCC) system and reinforced with 0-3 vol% Y2O3 was processed by mechanical alloying followed by spark plasma sintering (SPS). The compressive yield strength of the Alo(3)CoCrFeMnNi high-entropy alloy (HEA) increased phenomenally, from 0.98 GPa (0 vol% Y2O3) to 1.76 GPa (3 vol% Y2O3). A quantitative analysis by atom probe tomography (APT) suggested the in-situ formation of complex oxide resulting from the reaction of Y2O3 with the HEA matrix during processing, enhancing the strength. Using the dispersion-barrier hardening model, the strengthening by dispersoids in Ala(3)CoCrFeMnNi with Y2O3 was calculated, and closely matched the experimental results. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-03
Language
English
Article Type
Article
Citation

SCRIPTA MATERIALIA, v.162, pp.477 - 481

ISSN
1359-6462
DOI
10.1016/j.scriptamat.2018.12.021
URI
http://hdl.handle.net/10203/251620
Appears in Collection
MS-Journal Papers(저널논문)NE-Journal Papers(저널논문)
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