Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects

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	Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects
	R. T. Qu; J. X. Zhao; M. Stoica; J. Eckert; Z. F. Zhang
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	534 页码:365-373
摘要	Catastrophic fracture with nearly zero tensile elongation at room temperature in bulk metallic glasses (BMGs) makes their future application as structural materials seem bleak. The instable localized shear banding with "work softening" under unconfined uniaxial tension should be responsible for the zero elongation. Here we show how to control the shear band and make it contribute to the macroscopic tensile plasticity of BMGs through designed artificial defects. By promoting the initiation of shear bands and hindering their instable propagation through introducing artificial defects, appreciable macroscopic tensile plasticity was successfully achieved in a conventional Zr-based BMG. Moreover, by designing the distribution of the defects to inhibit the intrinsic shear fracture, the nominal tensile strength and elongation of the BMG have been enhanced simultaneously. The principles for toughening BMG through designed artificial defects are proposed; accordingly, some strategies for designing future porous BMG materials with high mechanical performance were presented. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[qu, r. t.; zhao, j. x.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [stoica, m.; eckert, j.] ifw dresden, inst complex mat, d-01171 dresden, germany. [eckert, j.] tech univ dresden, inst mat sci, d-01062 dresden, germany.;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	Bulk Metallic Glass Tensile Plasticity Strength Notch Shear Band Amorphous-alloys Room-temperature Shear Bands Mechanical-properties Enhanced Plasticity Matrix Composites Fracture Toughness Ductility Stress
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60199
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. T. Qu,J. X. Zhao,M. Stoica,et al. Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,534:365-373.
APA	R. T. Qu,J. X. Zhao,M. Stoica,J. Eckert,&Z. F. Zhang.(2012).Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,534,365-373.
MLA	R. T. Qu,et al."Macroscopic tensile plasticity of bulk metallic glass through designed artificial defects".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 534(2012):365-373.