Rotational deformation twins in a HfNbTaTiZr refractory high entropy alloy

被引：3
作者：
Senkov, Oleg N. [1 ,2 ]
Meisenkothen, Frederick [3 ]
Wheeler, Robert [1 ,4 ]
机构：
[1] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson Afb, OH 45433 USA
[2] MRL Mat Resources LLC, Xenia Township, OH 45385 USA
[3] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA
[4] UES Inc, Dayton, OH 45432 USA
来源：
ACTA MATERIALIA | 2024年 / 281卷
关键词：
Refractory alloy; Refractory high entropy alloy; HfNbTaTiZr; Microstructure; Deformation twinning; TENSILE PROPERTIES; MICROSTRUCTURE; CRYSTALLOGRAPHY; MECHANISMS; STRENGTH;
D O I：
10.1016/j.actamat.2024.120435
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Results of the analysis of deformation twins formed in a HfNbTaTiZr refractory high entropy alloy during compression deformation at 20 degrees C - 600 degrees C are reported. All studied twins were formed by rotation of the matrix crystal lattice around a (110) pole and have the common reciprocal twinning plane K2 = {001} and reciprocal twinning direction eta 2 = <110>. At the same time, the twinning plane K1 and direction eta 1 depend on the degree of rotation of K2 and eta 2 around the common (110) pole. The following rotational twinning modes have been identified in HfNbTaTiZr: {114}<221> (38.94 degrees rotation), {115}<552> (31.58 degrees), {116}<331> (26.54 degrees), {117}<772> (22.84 degrees), and {118}<441> (20.04 degrees). A rotational mechanism of twinning, with the rotation axis (011) or (001), is proposed as an alternative to the commonly accepted shear mechanism.
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页数：10
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