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.

引用

页数：10

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