Ductile-to-brittle transition in spallation of metallic glasses

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	Ductile-to-brittle transition in spallation of metallic glasses
	Huang X; Ling Z; Dai LH(戴兰宏); Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
刊名	JOURNAL OF APPLIED PHYSICS
	2014-10-14
卷号	116 期号:14 页码:143503
ISSN号	0021-8979
产权排序	[Huang, X.; Ling, Z.; Dai, L. H.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Huang, X.] China Acad Engn Phys, Inst Syst Engn, Mianyang 621999, Sichuan, Peoples R China; [Dai, L. H.] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 10081, Peoples R China
英文摘要	In this paper, the spallation behavior of a binary metallic glass Cu50Zr50 is investigated with molecular dynamics simulations. With increasing the impact velocity, micro-voids induced by tensile pulses become smaller and more concentrated. The phenomenon suggests a ductile-to-brittle transition during the spallation process. Further investigation indicates that the transition is controlled by the interaction between void nucleation and growth, which can be regarded as a competition between tension transformation zones (TTZs) and shear transformation zones (STZs) at atomic scale. As impact velocities become higher, the stress amplitude and temperature rise in the spall region increase and micro-structures of the material become more unstable. Therefore, TTZs are prone to activation in metallic glasses, leading to a brittle behavior during the spallation process. (C) 2014 AIP Publishing LLC.
学科主题	Physics
分类号	二类/Q2
URL标识	查看原文
语种	英语
WOS记录号	WOS:000343988000010
资助机构	Financial support was from the National Key Basic Research Program of China (2012CB937500), the NSFC (Grants Nos.: 11272328, 11472287, and 11402245), and the CAS/SAFEA International Partnership Program for Creative Research Teams.
公开日期	2014-12-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49391]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Huang X,Ling Z,Dai LH,et al. Ductile-to-brittle transition in spallation of metallic glasses[J]. JOURNAL OF APPLIED PHYSICS,2014,116(14):143503.
APA	Huang X,Ling Z,戴兰宏,&Dai, LH .(2014).Ductile-to-brittle transition in spallation of metallic glasses.JOURNAL OF APPLIED PHYSICS,116(14),143503.
MLA	Huang X,et al."Ductile-to-brittle transition in spallation of metallic glasses".JOURNAL OF APPLIED PHYSICS 116.14(2014):143503.