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Softening of Zr-based metallic glass induced by nanosecond pulsed laser irradiation
Huang H; Jiang MQ(蒋敏强); Yan JW
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
2018-07-25
卷号754页码:215-221
ISSN0925-8388
摘要Laser irradiation has been recently used to tune the mechanical properties of metallic glasses (MGs). However, the mechanism for plasticity improvement by laser irradiation is still not completely clear and requires further investigation. In this study, nanosecond pulsed laser irradiation is applied on a Zr-based MG surface under various laser powers, scanning speeds, and numbers of irradiation cycles. Then, the mechanical properties of the as-cast and laser-irradiated MG surfaces are characterized by nanoindentation tests. In particular, the indentation hardness, load-depth curve, serrated flow, and residual indent morphology of the surfaces are compared. The results show that the nanosecond pulsed laser irradiation softens the irradiated regions; the effect of the irradiation is slightly dependent on the laser irradiation parameters, and especially the laser scanning speed. Furthermore, laser irradiation considerably affects serrated flows in the load-depth curve and shear bands on the top surface, denoting different plastic deformation characteristics compared with the non-irradiated sample. These differences could be rationalized in terms of laser irradiation-induced formation of pre-existing shear bands in the subsurface layer, as well as thermal effects. The present results are expected to enhance the general understanding of the effects of laser irradiation on the mechanical properties of MGs. (C) 2018 Elsevier B.V. All rights reserved.
关键词Metallic Glass Laser Irradiation Nanoindentation Softening Serrated Flow Shear Band
DOI10.1016/j.jallcom.2018.04.278
收录类别SCI ; EI
语种英语
WOS记录号WOS:000432675600027
关键词[WOS]MECHANICAL-PROPERTIES ; STRUCTURAL INHOMOGENEITY ; PLASTIC-DEFORMATION ; ENHANCED PLASTICITY ; SURFACE TREATMENT ; RESIDUAL-STRESS ; PRE-COMPRESSION ; NANOINDENTATION ; BEHAVIOR ; HARDNESS
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China(51705197 ; State Key Laboratory of Nonlinear Mechanics(LNM201802) ; China Association for Science and Technology ; Chinese Mechanical Engineering Society (CMES) ; Fundamental Research Funds for the Central Universities ; (26-04048) ; 11522221)
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77507
专题非线性力学国家重点实验室
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Huang H,Jiang MQ,Yan JW. Softening of Zr-based metallic glass induced by nanosecond pulsed laser irradiation[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,754:215-221.
APA Huang H,蒋敏强,&Yan JW.(2018).Softening of Zr-based metallic glass induced by nanosecond pulsed laser irradiation.JOURNAL OF ALLOYS AND COMPOUNDS,754,215-221.
MLA Huang H,et al."Softening of Zr-based metallic glass induced by nanosecond pulsed laser irradiation".JOURNAL OF ALLOYS AND COMPOUNDS 754(2018):215-221.
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