Plastic deformability of metallic glass by artificial macroscopic notches

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	Plastic deformability of metallic glass by artificial macroscopic notches
	J. X. Zhao; F. F. Wu; R. T. Qu; S. X. Li; Z. F. Zhang
	2010
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	58 期号:16 页码:5420-5432
摘要	This paper reports that the plasticity of Zr-based metallic glass can be improved by creating two symmetrical semi-circular notches. Unlike the experimental findings of the samples without notches, a steady shear deformation can be created by the large-scale stress gradient around the two symmetrical notches and the plasticity of metallic glass can be enhanced to a high value of similar to 10% under compression tests. The improved plasticity may be due to the easy initiation of shear bands around the notches, and the consequent blocking effect of notches on the propagation of shear bands, similar to the dislocation mechanism in crystalline materials. To reveal the particular plastic deformation behavior of metallic glass, Ti(3)SiC(2) ceramic and high-strength steel specimens with two symmetrical semi-circular notches were also conducted under compressive loadings; however, no enhancement in plasticity was found. It is suggested that creating a stress gradient is a particular strategy for designing metallic glasses in order to improve their plasticity. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[zhao, j. x.; wu, f. f.; qu, r. t.; li, s. x.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wu, f. f.] liaoning univ technol, sch mat sci & engn, jinzhou 121001, peoples r china.;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 Glass Shear Band Plastic Deformation Notch Stress Gradient Bulk Amorphous-alloys Fracture-behavior Mechanical-properties Stress-concentration Enhanced Plasticity Supercooled Liquid Shear Deformation Flow Microstructure Pressure
URL	查看原文
WOS记录号	WOS:000281318900020
引用统计	被引频次：73[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/321006/31742
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. X. Zhao,F. F. Wu,R. T. Qu,et al. Plastic deformability of metallic glass by artificial macroscopic notches[J]. Acta Materialia,2010,58(16):5420-5432.
APA	J. X. Zhao,F. F. Wu,R. T. Qu,S. X. Li,&Z. F. Zhang.(2010).Plastic deformability of metallic glass by artificial macroscopic notches.Acta Materialia,58(16),5420-5432.
MLA	J. X. Zhao,et al."Plastic deformability of metallic glass by artificial macroscopic notches".Acta Materialia 58.16(2010):5420-5432.