Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave

doi:10.1016/j.jnoncrysol.2019.02.031

	Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave
	Li YS(李燕升); Wei YP(魏延鹏); Zhang K(张坤); Zhang YT(张亚婷); Wang Y(王阳); Tang WQ(唐玮琪); Wei BC(魏炳忱)
刊名	JOURNAL OF NON-CRYSTALLINE SOLIDS
	2019-06-01
卷号	513 页码:76-83
关键词	Metallic glass Laser shock wave Rejuvenation Shear bands Tensile plasticity
ISSN号	0022-3093
DOI	10.1016/j.jnoncrysol.2019.02.031
通讯作者	Zhang, Kun(zhangkun@imech.ac.cn) ; Wei, Bingchen(weibc@imech.ac.cn)
英文摘要	The structural and mechanical responses of Ti-based and Zr-based metallic glasses (MGs) treated by the nanosecond laser shock wave were investigated. A rejuvenation transition was observed, due to the structural rearrangement of neighboring atoms in the instantaneous shock process. Plenty of embryonic shear bands occurred along the shock-affected zone. A damped model of the shock pressure was established to describe the characteristic of the embryonic shear bands. The results showed that the shear band initiation in the nanosecond scale along the length direction was divided into two stages: the initial low propagation stage and the following fast propagation stage, because of the reduction of the shock pressure. The hardness of the shock-affected zone displayed a maximal decrease of 25% in the critical zone between the two propagation stages, due to the combined effect of the structural rejuvenation and the compressive residual stress. A schematic of the energy landscape was proposed to explain the relationship between the rejuvenation and the formation of the embryonic shear bands. The maximum tensile plasticity increased by 0.46%. The results demonstrated that the MGs possessed different shear band propagation modes in the initiation stages, which deepened the understanding of the deformation mechanism in the MGs.
分类号	一类
资助项目	National Natural Science Foundation of China[51401028] ; National Natural Science Foundation of China[51271193] ; National Natural Science Foundation of China[11402277] ; National Natural Science Foundation of China[11790292] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040303]
WOS关键词	FRACTURE ; MECHANISMS
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000469890700011
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Zhang, Kun ; Wei, Bingchen
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79331]
专题	力学研究所_国家微重力实验室力学研究所_流固耦合系统力学重点实验室(2012-)
推荐引用方式 GB/T 7714	Li YS,Wei YP,Zhang K,et al. Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2019,513:76-83.
APA	李燕升.,魏延鹏.,张坤.,张亚婷.,王阳.,...&魏炳忱.(2019).Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave.JOURNAL OF NON-CRYSTALLINE SOLIDS,513,76-83.
MLA	李燕升,et al."Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave".JOURNAL OF NON-CRYSTALLINE SOLIDS 513(2019):76-83.