Local mechanical properties of AlxCoCrCuFeNi high entropy alloy characterized using nanoindentation

被引：68

作者：

Sun, Yanan ^{[1
]}

Chen, Peng ^{[1
]}

Liu, Lehua ^{[2
]}

Yan, Ming ^{[3
]}

Wu, Xiaoyu ^{[1
]}

Yu, Chunyan ^{[4
]}

Liu, Zhiyuan ^{[1
]}

机构：

[1] Shenzhen Univ, Guangdong Prov Key Lab Micro Nano Optomechatron E, Shenzhen, Peoples R China

[2] Tsinghua Univ, Dept Mech Engn, Beijing, Peoples R China

[3] South Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Peoples R China

[4] Shenzhen Univ, Coll Phys & Energy, Shenzhen, Peoples R China

来源：

INTERMETALLICS | 2018年 / 93卷

基金：

中国国家自然科学基金;

关键词：

High entropy alloy; Solid solution strengthening; Nanoindentation; Hardness and modulus; Elastic modulus mismatch; Lattice distortion; MICROSTRUCTURE; FCC;

D O I：

10.1016/j.intermet.2017.11.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

With the addition of Al element, the microstructure of high entropy alloy AlxCoCrCuFeNi ( x= 0.5, 1.5 and 3.0) changes from single FCC to FCC + BCC and then to single BCC phase. Hardness and elastic modulus of different phases in the HEAs are measured utilizing nanoindentation method. It is found that with the increase of the Al element, the hardness rises more significantly in the BCC phase than that in the FCC phase. The reason is attributed to that the AI element has a stronger solid-solution strengthening effect in the BCC phase, due to the larger elastic modulus mismatch. The precise characterization of local mechanical properties of different phases in the HEAs provides us opportunity to design alloys with desired performance.

引用

页码：85 / 88

页数：4

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