Elasticity dominates strength and failure in metallic glasses

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	Elasticity dominates strength and failure in metallic glasses
	Z. Q.; Qu Liu, R. T.; Zhang, Z. F.
	2015
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	117 期号:1
摘要	Two distinct deformation mechanisms of shearing and volume dilatation are quantitatively analyzed in metallic glasses (MGs) from the fundamental thermodynamics. Their competition is deduced to intrinsically dominate the strength and failure behaviors of MGs. Both the intrinsic shear and normal strengths give rise to the critical mechanical energies to activate destabilization of amorphous structures, under pure shearing and volume dilatation, respectively, and can be determined in terms of elastic constants. By adopting an ellipse failure criterion, the strength and failure behaviors of MGs can be precisely described just according to their shear modulus and Poisson's ratio without mechanical testing. Quantitative relations are established systematically and verified by experimental results. Accordingly, the real-sense non-destructive failure prediction can be achieved in various MGs. By highlighting the broad key significance of elasticity, a "composition-elasticity-property" scheme is further outlined for better understanding and controlling the mechanical properties of MGs and other glassy materials from the elastic perspectives. (C) 2015 AIP Publishing LLC.
部门归属	[liu, z. q. ; qu, r. t. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhfzhang@imr.ac.cn
关键词	Bulk Amorphous-alloys Room-temperature Mechanical-properties Fracture-toughness Free-volume Plastic-deformation Yield Criterion Poissons Ratio Transition Behavior
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73877
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q.,Qu Liu, R. T.,Zhang, Z. F.. Elasticity dominates strength and failure in metallic glasses[J]. Journal of Applied Physics,2015,117(1).
APA	Z. Q.,Qu Liu, R. T.,&Zhang, Z. F..(2015).Elasticity dominates strength and failure in metallic glasses.Journal of Applied Physics,117(1).
MLA	Z. Q.,et al."Elasticity dominates strength and failure in metallic glasses".Journal of Applied Physics 117.1(2015).