ISSN:1000-8365 CN:61-1134/TG
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Research Progress on the Control of L1 2 Nanoprecipitation in High-entropy Alloys
Author of the article: high-entropy alloy; precipitation strengthening; composition control; thermal-mechanical treatment
Author's Workplace:State Key Laboratory of Solidification Processing
Key Words:high-entropy alloy; precipitation strengthening; composition control; thermal-mechanical treatment
Abstract: High-entropy alloys are a new type of metal material composed of various alloy elements with equal or nearlyequal atomic ratios. High-entropy alloys have excellent properties due to their unique atomic structure and alloy design concept. In the precipitation strengthened high-entropy alloys, the ductile L1 2 nanoprecipitation can hinder the dislocation movement. This phenomenon can not only improve the strength but also ensure good ductility, which has attracted widespread research interest. Furthermore, it is important to control the size, morphology, distribution and volume fraction of the L1 2 phase in the alloy to improve the mechanical properties of precipitation strengthened high-entropy alloys. Based on this, the influences of alloy composition and thermal-mechanical treatment process parameters such as aging temperature, aging time and plastic deformation on the L1 2 phase are reviewed in this article. Additionally, the methods for designing new L1 2 phase strengthened high entropy alloys are summarized. Finally, the research on L1 2 -precipitation strengthened high entropy alloys is briefly summarized and outlooked.