Mechanical properties, damage and fracture mechanisms of bulk metallic glass materials

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	Mechanical properties, damage and fracture mechanisms of bulk metallic glass materials
	Z. F. Zhang; F. F. Wu; G. He; J. Eckert
	2007
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	23 期号:6 页码:747-+
摘要	The deformation, damage, fracture, plasticity and melting phenomenon induced by shear fracture were investigated and summarized for Zr-, Cu-, Ti- and Mg-based bulk metallic glasses (BMGs) and their composites. The shear fracture angles of these BMG materials often display obvious differences under compression and tension, and follow either the Mohr-Coulomb criterion or the unified tensile fracture criterion. The compressive plasticity of the composites is always higher than the tensile plasticity, leading to a significant inconsistency. The enhanced plasticity of BMG composites containing ductile dendrites compared to monolithic glasses strongly depends on the details of the microstructure of the composites. A deformation and damage mechanism of pseudo-plasticity, related to local cracking, is proposed to explain the inconsistency of plastic deformation under tension and compression. Besides, significant melting on the shear fracture surfaces was observed. It is suggested that melting is a common phenomenon in these materials with high strength and high elastic energy, as it is typical for BMGs and their composites failing under shear fracture. The melting mechanism can be explained by a combined effect of a significant temperature rise in the shear bands and the instantaneous release of the large amount of elastic energy stored in the material.
部门归属	[zhang, zhefeng; wu, fufa] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [he, guo] shanghai jiao tong univ, sch mat sci & engn, shanghai 200030, peoples r china. [eckert, j.] ifw dresden, inst complex mat, d-01171 dresden, germany. [eckert, j.] tech univ dresden, inst sci mat, d-01062 dresden, germany.;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 Metallic Glasses (Bmgs) Mechanical Properties Shear Fracture Failure Criterion Plastic Deformation Melting Phenomenon Supercooled Liquid Region Fatigue-crack-propagation Nanostructure-dendrite Composite Soft-magnetic Properties Serrated Plastic-flow Ni Amorphous-alloys Ti-based Composites In-situ Formation Cu-be Alloy High-strength
URL	查看原文
WOS记录号	WOS:000251621300002
引用统计	被引频次：69[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/321006/34064
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Zhang,F. F. Wu,G. He,et al. Mechanical properties, damage and fracture mechanisms of bulk metallic glass materials[J]. Journal of Materials Science & Technology,2007,23(6):747-+.
APA	Z. F. Zhang,F. F. Wu,G. He,&J. Eckert.(2007).Mechanical properties, damage and fracture mechanisms of bulk metallic glass materials.Journal of Materials Science & Technology,23(6),747-+.
MLA	Z. F. Zhang,et al."Mechanical properties, damage and fracture mechanisms of bulk metallic glass materials".Journal of Materials Science & Technology 23.6(2007):747-+.