Insights into the effects of grain size variation and FCC phase formation on the oxidation behavior of laser additively manufactured BCC AlCoCrFeNi high entropy alloy

被引:3
作者
Zhou, Ziyi [1 ,2 ,3 ]
Zhang, Xue [1 ]
Peng, Xiao [1 ,2 ,3 ]
Xie, Yun [1 ,2 ]
Yang, Shouhua [1 ,2 ,3 ]
Li, Haonan [1 ,2 ]
Guo, Hongbo [3 ]
机构
[1] Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China
[2] Nanchang Hangkong Univ, Jiangxi Prov Engn Res Ctr Surface Technol Aeronaut, Nanchang 330063, Jiangxi, Peoples R China
[3] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
High-entropy alloys; Laser additive manufacturing; Heat treatment; High-temperature oxidation; RESISTANCE;
D O I
10.1016/j.corsci.2024.112416
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The laser melting deposition technique was employed to fabricate a high entropy alloy of body-centered-cubic (BCC) AlCoCrFeNi with varying grain sizes. Subsequent annealing or quenching heat-treatment resulted in the precipitation of additional fine face-centered-cubic (FCC) phases. Oxidation at 1000 degrees C showed that the refinement of grains unexpectedly weakened the ability of the BCC alloy to sustain steady-state growth of an external Al2O3 scale, while the formation of FCC phases proved beneficial in promoting and maintaining exclusive and consistent growth of Al2O3 scale. The reasons behind these findings were thoroughly elucidated based on microstructural investigations of the formed oxide scales.
引用
收藏
页数:11
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