Size-dependent shear fracture and global tensile plasticity of metallic glasses

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	Size-dependent shear fracture and global tensile plasticity of metallic glasses
	F. F. Wu; Z. F. Zhang; S. X. Mao
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:1 页码:257-266
摘要	The tensile ductility or brittleness of metallic glasses is found to depend strongly oil the critical shear offset. Based oil experimental observations, the tensile shear fracture processes of metallic glasses can be divided into three stages: multiplication and coalescence of the free volume, formation of void and the final fast propagation of a shear crack. Accordingly, the size effect on the tensile shear deformation processes of metallic glass can be well understood: with decreasing specimen size smaller than the equivalent critical shear offset, the shear deformation of metallic glass is changed from unstable to stable, which leads to a transition from global brittleness on the macroscale to large global plasticity or even necking oil the microscale. These results are fundamentally useful in understanding the physical nature of tensile shear deformation of various metallic glasses and even in the design of new metallic glass materials with good plasticity. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[wu, f. f.; zhang, z. f.; mao, s. x.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wu, f. f.] liaoning univ technol, sch mat & chem engn, jinzhou 121001, peoples r china. [mao, s. x.] univ pittsburgh, dept mech engn & mat sci, pittsburgh, pa 15261 usa.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Metallic Glasses Shear Band Plastic Deformation Tensile Plasticity Critical Shear Offset Bulk Amorphous-alloys Compressive Properties Mechanical-properties Forming Ability Aspect Ratio Bands Deformation Ductility Behavior Fragmentation
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WOS记录号	WOS:000263695300028
引用统计	被引频次：152[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32421
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. F. Wu,Z. F. Zhang,S. X. Mao. Size-dependent shear fracture and global tensile plasticity of metallic glasses[J]. Acta Materialia,2009,57(1):257-266.
APA	F. F. Wu,Z. F. Zhang,&S. X. Mao.(2009).Size-dependent shear fracture and global tensile plasticity of metallic glasses.Acta Materialia,57(1),257-266.
MLA	F. F. Wu,et al."Size-dependent shear fracture and global tensile plasticity of metallic glasses".Acta Materialia 57.1(2009):257-266.