Shear banding stability and fracture of metallic glass: Effect of external confinement

doi:10.1016/j.jmps.2020.103922

IMR OpenIR

	Shear banding stability and fracture of metallic glass: Effect of external confinement
	Qu, R. T.1,2,3; Wu, S. J.1,2; Wang, S. G.4; Wang, X. D.1; Zhang, Z. F.1,2,3
通讯作者	Qu, R. T.(rtqu@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2020-05-01
发表期刊	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
ISSN	0022-5096
卷号	138 页码:17
摘要	While metallic glasses (MGs) usually fracture catastrophically under uniaxial loading, external confinement like coating has been proved quite effective for improving the plasticity. The positive effect of confinement was mainly attributed to the lateral confining stress on the interface between sample and confinement, which impedes the excess propagation of shear bands and promotes their multiplication. Here we show that, even though there is no contact between the MG and the confinement, the brittle fracture can be effectively suppressed. Three dimensional (3D) high resolution X-ray tomography observations successfully captured the shear-band cracking evolution and confirmed that the external confinement caused the change of shear-band fracture mode. Analysis on the thermodynamics and kinetics of shear banding in the confined MG shows that the confinement extremely reduces the shear velocity, contributes to the shear band arrest, and largely lowers the energy release rate, leading to the increase of the shear stability and the resistance to instant fracture. Finally, the mechanisms of confinement effect on the plastic deformation in various confined MG systems were summarized. These results suggest new understandings on the effect of confinement for the fracture of MG composites or coated MG structures, and on the mechanisms of shear-band cracking and fracture in different MG loading systems. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	Shear band Confinement Fracture Plasticity Metallic glass
资助者	National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI	10.1016/j.jmps.2020.103922
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51771205] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS研究方向	Materials Science ; Mechanics ; Physics
WOS类目	Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS记录号	WOS:000525896300020
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138383
专题	中国科学院金属研究所
通讯作者	Qu, R. T.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Jihua Lab, Foshan 528200, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Qu, R. T.,Wu, S. J.,Wang, S. G.,et al. Shear banding stability and fracture of metallic glass: Effect of external confinement[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2020,138:17.
APA	Qu, R. T.,Wu, S. J.,Wang, S. G.,Wang, X. D.,&Zhang, Z. F..(2020).Shear banding stability and fracture of metallic glass: Effect of external confinement.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,138,17.
MLA	Qu, R. T.,et al."Shear banding stability and fracture of metallic glass: Effect of external confinement".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 138(2020):17.