In situ observation of bending stress-deflection response of metallic glass

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	In situ observation of bending stress-deflection response of metallic glass
	R. T. Qu; H. S. Liu; Z. F. Zhang
	2013
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	582 页码:155-161
摘要	Understanding the shear banding mechanism is of significance not only for improving the mechanical performance of metallic glassy components but also for designing new metallic glassy materials with better combinations of strength and toughness. In this study, through an in situ bending experiment under a scanning electron microscope, the shear banding behavior and the bending stress-deflection response were investigated. We found that the flexural strength was higher than either the tensile strength or the compressive strength of the identical metallic glass. The initial appearance of shear bands was observed at a stress lower than the flexural yield strength. As shear band propagating stably, the flexural stress increases with increasing the deflection, which is similar to but analytically found different with the traditional "work-hardening" behavior of metallic crystalline materials. At the peak stress, a shear banding instability with an abrupt increment of plastic deformation localization and shear cracking was found. Some shear band zones were observed and the size of the zone in tension side of the bending sample was found larger than that in compression side. (C) 2013 Elsevier B.V. All rights reserved.
部门归属	[qu, r. t. ; liu, h. s. ; 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, 72 wenhua rd, shenyang 110016, peoples r china. ; zhfzhang@imr.ac.cn
关键词	Metallic Glass Shear Band Bending Test In Situ Observation Shear Bands Mechanical-properties Fracture Mechanisms Tensile Plasticity Amorphous-alloys Bulk Temperature Ductility Behavior Evolution
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71437
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. T. Qu,H. S. Liu,Z. F. Zhang. In situ observation of bending stress-deflection response of metallic glass[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2013,582:155-161.
APA	R. T. Qu,H. S. Liu,&Z. F. Zhang.(2013).In situ observation of bending stress-deflection response of metallic glass.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,582,155-161.
MLA	R. T. Qu,et al."In situ observation of bending stress-deflection response of metallic glass".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 582(2013):155-161.