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Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave
Li YS(李炎森); Wei YP(魏延鹏); Zhang K(张坤); Zhang YT(张亚婷); Wang Y(王洋); Tang WQ(唐玮琪); Wei BC(魏炳忱)
Source PublicationJOURNAL OF NON-CRYSTALLINE SOLIDS
2019-06-01
Volume513Pages:76-83
ISSN0022-3093
Abstract

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.

KeywordMetallic glass Laser shock wave Rejuvenation Shear bands Tensile plasticity
DOI10.1016/j.jnoncrysol.2019.02.031
Indexed BySCI ; EI
Language英语
WOS IDWOS:000469890700011
WOS KeywordFRACTURE ; MECHANISMS
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics ; Materials Science, Multidisciplinary
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
Classification一类
Ranking1
ContributorZhang, Kun
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79331
Collection国家微重力实验室
流固耦合系统力学重点实验室
Recommended Citation
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 Li YS.,Wei YP.,Zhang K.,Zhang YT.,Wang Y.,...&Wei BC.(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 Li YS,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.
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