Abnormal softening of Ti-metallic glasses during nanosecond laser shock peening

doi:10.1016/j.msea.2019.138844

	Abnormal softening of Ti-metallic glasses during nanosecond laser shock peening
	Li YS(李炎森)1,3; Zhang K(张坤)1,3; Wang Y(王洋)1,3; Tang WQ(唐伟奇)1,3; Zhang YT(张亚婷)1,3; Wei BC(魏炳忱)1,2,3; Hu Z(胡铮)4
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-01-31
卷号	773 页码:6
关键词	Laser shock wave Metallic glass Grid nanoindentation
ISSN号	0921-5093
DOI	10.1016/j.msea.2019.138844
通讯作者	Zhang, Kun(zhangkun@imech.ac.cn) ; Wei, Bingchen(weibc@imech.ac.cn)
英文摘要	Nanosecond laser shock peening (NLSP) has been proved to be an effective way to enhance the mechanical properties of metallic components through modifying the surface microstructures. However, the micromechanism of structure and property fluctuations induced by shock wave propagation is still limited due to the intrinsic defects in crystalline materials. Here, NLSP treatment has been performed into the Ti-metallic glasses. Owing to the absence of dislocations, grain boundary and phase segregation, the structural signals caused by the shock wave could come into sight. According to grid nanoindentation results, the shock-affected region can be divided into three sections: (I) the rapid softening region, (II) the recovery region and (III) the matrix region. The fronted first pop-in event and the reduced hardness found in the subsurface region provide clear evidence of the release wave-induced structural rearrangement. The abnormal change of the average volume of the shear transformation zone (STZ) could be explained by a two-step transformation mechanism, due to the fluctuations of the "weak spot" induced by the release stress wave. By means of these results, this work provides an opportunity to shed light on the common laser-solid interaction.
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] ; Innovation Program[237099000000170004]
WOS关键词	SHEAR BANDS ; RESIDUAL-STRESS ; NANOINDENTATION ; COMPRESSION ; ALLOY ; REJUVENATION ; DEFORMATION ; PLASTICITY ; TI-6AL-4V ; BEHAVIOR
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000513985200003
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Innovation Program
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/311007/81604]
专题	力学研究所_国家微重力实验室
作者单位	1.Chinese Acad Sci, Inst Mech, CAS Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.China North Vehicle Res Inst, Sci & Technol Vehicle Transmiss Lab, Beijing 100072, Peoples R China
推荐引用方式 GB/T 7714	Li YS,Zhang K,Wang Y,et al. Abnormal softening of Ti-metallic glasses during nanosecond laser shock peening[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,773:6.
APA	李炎森.,张坤.,王洋.,唐伟奇.,张亚婷.,...&胡铮.(2020).Abnormal softening of Ti-metallic glasses during nanosecond laser shock peening.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,773,6.
MLA	李炎森,et al."Abnormal softening of Ti-metallic glasses during nanosecond laser shock peening".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 773(2020):6.