Significant reduction in friction and wear of a high-entropy alloy via the formation of self-organized nanolayered structure

Sliding wear-induced nanolayering and its positive impact on wear resistance have been observed in conventional binary alloys with a matrix of high stacking fault energy (SFE), but this concept has never been reported in high-entropy alloys (HEAs) with low SFE. Here, we design and fabricate a (CoCrF...

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Bibliographic Details
Published inJournal of materials science & technology Vol. 73; pp. 1 - 8
Main Authors Yang, Lu, Cheng, Zhuo, Zhu, Weiwei, Zhao, Cancan, Ren, Fuzeng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 20.05.2021
Subjects
High-entropy alloy
Nanolayering
Sliding wear
Sliding wear
Nanolayering
High-entropy alloy
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Summary:Sliding wear-induced nanolayering and its positive impact on wear resistance have been observed in conventional binary alloys with a matrix of high stacking fault energy (SFE), but this concept has never been reported in high-entropy alloys (HEAs) with low SFE. Here, we design and fabricate a (CoCrFeNi)90Ag10 HEA, consisting of a face-center-cubic (fcc) CoCrFeNi HEA matrix with low SFE and uniformly dispersed Ag precipitates. In comparison with CoCrFeNi, a significant reduction in friction and wear was found in (CoCrFeNi)90Ag10 HEA through the spontaneous formation of nanolayered subsurface microstructure during wear. The finding suggests a novel approach for designing HEAs that can achieve low friction and wear.
ISSN:1005-0302
1941-1162
DOI:10.1016/j.jmst.2020.08.065