Temperature dependent small-scale deformation of a refractory high entropy alloy

被引：0
|
作者：
Jha, Shristy [1 ]
Alla, Siva Shankar [1 ]
Bhowmick, Sanjit [2 ]
Mukherjee, Sundeep [1 ]
机构：
[1] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA
[2] Bruker Nano Surfaces, Minneapolis, MN 55344 USA
来源：
MATERIALS LETTERS | 2025年 / 379卷
关键词：
High entropy alloy; Refractory; Micropillar compression; RATE SENSITIVITY; STRENGTH; MODEL;
D O I：
10.1016/j.matlet.2024.137649
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Temperature-dependent deformation behavior of [110] oriented micropillars of HfTaTiVZr refractory high entropy alloy (RHEA) was studied. Engineering stress-strain curves, strain rate sensitivity measurements, and insitu observations revealed distinct deformation mechanisms at different temperatures: homogeneous at room temperature (RT), intermittent plasticity at 200 degrees C, chaotic stress drops at 400 degrees C, brittle failure at 600 degrees C, and creep-like behavior at 800 degrees C. Deformation morphology of the micropillars showed activation of few slip systems at RT and 200 degrees C, multiple slip systems at 400 degrees C, catastrophic failure at 600 degrees C, and minimal slip activity at 800 degrees C. These findings offer unique insights into the deformation of RHEAs.
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页数：4
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