Orientation dependent stress-induced martensitic and omega transformations in a refractory high entropy alloy

被引：4

作者：

Jha, Shristy ^{[1
]}

Sharma, Abhishek ^{[1
]}

Dasari, Sriswaroop ^{[1
]}

Muskeri, Saideep ^{[1
]}

Banerjee, Rajarshi ^{[1
]}

Mukherjee, Sundeep ^{[1
]}

机构：

[1] Univ North Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA

来源：

MATERIALIA | 2023年 / 28卷

关键词：

high entropy alloy; refractory; micropillar compression; strain rate sensitivity; HIGH-TEMPERATURE; MECHANICAL-BEHAVIOR; DEFORMATION; PLASTICITY; EXPLORATION; OXYGEN;

D O I：

10.1016/j.mtla.2023.101741

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deformation behavior of a single-phase body centered cubic refractory high entropy alloy, namely HfTaTiVZr, was evaluated by micropillar compression as a function of two different grain orientations, namely [101] and [111]. The [111] oriented micropillars demonstrated higher strength and strain hardening rate compared to [101] oriented micropillars. The [111] oriented micropillars showed transformation induced plasticity (TRIP) in contrast to dislocation-based planar-slip for the [101] oriented micropillars, explaining the difference in strain hardenability for the two orientations. These differences in deformation behavior for the two orientations were explained using Schmid factor calculations, transmission electron microscopy, and in-situ deformation videos. The insights gained from this study may help guide alloy design strategies by utilizing deformation induced phase transformations.

引用

页数：7

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