非晶合金中剪切温升的研究进展

doi:10.11896/cldb.22050070

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Abstract Bulk metallic glasses (BMGs) possess amorphous structure that lacks long-range orders. In contrast to crystal metals, shear banding is ge-nerally believed to be a common plastic deformation mode at temperatures far below glass transition temperature for monolithic BMGs. While shear bands can accommodate some plastic strain, they would evolve into cracks to cause the catastrophic fracture of BMG samples. The investigation of shear-banding instability contributes to the understanding of plastic deformation mechanisms and further provides insights on strategies for improving the plastic deformation capability of BMGs. It is reported that structural softening and thermal softening are two potential origins of shear-banding instability in BMGs. In this review, we summarize the investigations on the shear heating mainly from four aspects, including temperature rises depending on testing strain rates, the external confinement, testing-machine stiffnesses, and testing temperatures. Finally, we discuss some key issues on the investigation of temperature rises and provide research topics for understanding shear-banding instability.

Key words： bulk metallic glasses shear-banding instability temperature rises serrated flows thermal softening

Published: 25 April 2024 Online: 2024-04-28

CLC number:

O75

Fund:Fundamental Research Program of Shanxi Province, China (20210302124098) and the Opening Project of Shanxi Provincial Key Laboratory for Advanced Manufacturing Technology (XJZZ202204).

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	LI Jiaojiao
	FAN Jing
	WANG Zhong

Cite this article:

LI Jiaojiao,FAN Jing,WANG Zhong. A Brief Overview of Temperature Rises During Shear Banding in Bulk Metallic Glasses[J]. Materials Reports, 2024, 38(8): 22050070-8.

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https://www.mater-rep.com/EN/10.11896/cldb.22050070 OR https://www.mater-rep.com/EN/Y2024/V38/I8/22050070

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