Effects of ultrasonic surface mechanical attrition treatment on microstructures and mechanical properties of high entropy alloys

M. T. Tsai, J. C. Huang, W. Y. Tsai, T. H. Chou, Chin Fu Chen, T. H. Li, J. S.C. Jang

研究成果: 雜誌貢獻期刊論文同行評審

44 引文 斯高帕斯(Scopus)

摘要

Most high entropy alloys (HEAs) are cast to form single phase solid solution. Their hardness and strength at room temperature under the as-cast condition are typically lower than expectation. In the research, the ultrasonic surface mechanical attrition treatment (SMAT) is conducted on the surface of two HEAs, FeCoNiCrMn and FeCoNiCrMn-Al, to upgrade their room temperature surface characteristics. By proper SMAT multiple paths, the grain size can be reduced from ∼50 μm down to ∼0.1–1 μm, the hardness increased from ∼2.5–5.0 GPa up to ∼5.0–8.5 GPa, and the tensile strength and elongation can be nearly doubled. The gradient refined and strengthened surface layers are demonstrated to appreciably upgrade the HEA performance. The strengthening mechanisms and superposition rules are established and are compared well with the experimental measurements.

原文???core.languages.en_GB???
頁(從 - 到)113-121
頁數9
期刊Intermetallics
93
DOIs
出版狀態已出版 - 2月 2018

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