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How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?
Huang X(黄鑫); Ling Z(凌中); Zhang HS(张虎生); Ma J; Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Source PublicationJournal of Applied Physics
2011
Volume110Issue:10Pages:103519
ISSN0021-8979
AbstractSpecially designed plate-impact experiments have been conducted on a Zr-based amorphous alloy using a single-stage light gas gun. To understand the microdamage nucleation process in the material, the samples are subjected to dynamic tensile loadings of identical amplitude (similar to 3.18 GPa) but with different durations (83-201 ns). A cellular pattern with an equiaxed shape is observed on the spallation surface, which shows that spallation in the tested amorphous alloy is a typical ductile fracture and that microvoids have been nucleated during the process. Based on the observed fracture morphologies of the spallation surface and free-volume theory, we propose a microvoid nucleation model of bulk amorphous alloys. It is found that nucleation of microvoids at the early stage of spallation in amorphous alloys results from diffusion and coalescence of free volume, and that high mean tensile stress plays a dominant role in microvoid nucleation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3663332]
KeywordMetallic-glass Deformation Fracture Failure Solids Model Flow Transformation Localization Compression
Subject AreaPhysics
DOI10.1063/1.3663332
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000297943700054
WOS KeywordMETALLIC-GLASS ; DEFORMATION ; FRACTURE ; FAILURE ; SOLIDS ; MODEL ; FLOW ; TRANSFORMATION ; LOCALIZATION ; COMPRESSION
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
Funding OrganizationFinancial support was from the NSFC (Grant Nos. 10872206, 10721202, 10725211, and 11132011), the National Natural Science Foundation of China-NSAF. Grant No: 10976100, and the National Basic Research Program of China (Grant No. 2009CB724401).
DepartmentLNM冲击动力学与新型材料力学性能
Classification二类/Q2
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44894
Collection非线性力学国家重点实验室
Corresponding AuthorDai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Huang X,Ling Z,Zhang HS,et al. How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?[J]. Journal of Applied Physics,2011,110(10):103519.
APA Huang X,Ling Z,Zhang HS,Ma J,Dai LH,&Dai, LH .(2011).How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?.Journal of Applied Physics,110(10),103519.
MLA Huang X,et al."How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?".Journal of Applied Physics 110.10(2011):103519.
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