An alternative formation mechanism of {332}BCC twinning in metastable body-centered-cubic high entropy alloy

Gao，Junheng1,2; Huang，Yuhe2,3,4; Hu，Xiaogang3,4; Wang，Shuize1; Rainforth，W. Mark2; Todd，Iain2; Zhu，Qiang3,4

2022-08-01

10.1016/j.scriptamat.2022.114770

SCRIPTA MATERIALIA   影响因子和分区

1359-6462

1872-8456

In this work, the origin of {332} twinning was investigated in a body-centered-cubic (BCC) high entropy alloy (TiZrHf)Ta (at.%). Detailed transmission electron microscopy analysis of the deformed microstructure revealed that a special ‘‘{351}’’<2¯11> type II twinning generates in the early deformation stage, and with further straining, the ‘‘{351}’’<2¯11> type II twin variant accommodates into a {351} type I twin variant. The resultant {351} type I twinning exhibits good lattice correspondence with the {332} twinning and further propagates into the retained BCC grain with orientation relationship of {351}//(332), structuring into a {332} twin-like configuration. Based on the experimental results and twinning analysis through evaluating twinning shear and atomic shuffle mechanism of this specific feature, our findings provide an alternative mechanism for the formation of {332} twinning in which a special martensitic type II to type I twinning transformation mechanism took effect.

High entropy alloy HRTEM Martensitic phase transformation Twinning

SCI ; EI

英语

其他

Basic and Applied Basic Research Foundation of Guangdong Province[2021A1515110348];National Key Research and Development Program of China[2021YFB3702400];Engineering and Physical Sciences Research Council[EP/P006566/1];Henry Royce Institute[EP/R00661X/1];Science, Technology and Innovation Commission of Shenzhen Municipality[KQTD20170328154443162];Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS201703031748354];

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000797267300005

PERGAMON-ELSEVIER SCIENCE LTD

20221912081564

Entropy ; High-entropy alloys ; Martensitic transformations ; Shear flow ; Twinning

Metallurgy and Metallography:531 ; Metallography:531.2 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Fluid Flow, General:631.1 ; Thermodynamics:641.1 ; Optical Devices and Systems:741.3 ; Crystal Growth:933.1.2

MATERIALS SCIENCE

2-s2.0-85129459463

Scopus

1.Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing,100083,China
2.Department of Materials Science and Engineering,University of Sheffield,Sheffield,UK,S1 3JD,United Kingdom
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,China

Gao，Junheng,Huang，Yuhe,Hu，Xiaogang,et al. An alternative formation mechanism of {332}BCC twinning in metastable body-centered-cubic high entropy alloy[J]. SCRIPTA MATERIALIA,2022,217.

Gao，Junheng.,Huang，Yuhe.,Hu，Xiaogang.,Wang，Shuize.,Rainforth，W. Mark.,...&Zhu，Qiang.(2022).An alternative formation mechanism of {332}BCC twinning in metastable body-centered-cubic high entropy alloy.SCRIPTA MATERIALIA,217.

Gao，Junheng,et al."An alternative formation mechanism of {332}BCC twinning in metastable body-centered-cubic high entropy alloy".SCRIPTA MATERIALIA 217(2022).