Fatigue and fracture behavior of bulk metallic glass

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	Fatigue and fracture behavior of bulk metallic glass
	Z. F. Zhang; J. Eckert; L. Schultz
	2004
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	35A 期号:11 页码:3489-3498
摘要	Tensile, compressive, cyclic tension-tension, and cyclic compression-compression tests at room temperature were systematically applied to a Zr52.5CU17.9Al10Ni14.6Ti5 bulk metallic glass for comprehensive understanding of its damage and fracture mechanisms. Under tensile loading, the metallic glass only displays elastic deformation followed by brittle shear fracture. Under compressive loading, after elastic deformadon, obvious plasticity (0.5 to 0.8 pct) can be observed before the final shear fracture. The fracture strength under compression is slightly higher than that under tension. The shear fracture under compression and tension does not occur along the maximum shear stress plane. This indicates that the fracture behavior of the metallic glass does not follow the Tresca criterion. The fracture surfaces show remarkably different features, i.e., a uniform vein structure (compressive fracture) and round cores coexisting with the radiating veins (tensile fracture). Under cyclic tension-tension loading, fatigue cracks are first initiated along localized shear bands on the specimen surface, then propagated along a plane basically perpendicular to the stress axis. A surface damage layer exists under cyclic compression-compression loading. However, the final failure also exhibits a pure shear fracture feature as under uniaxial compression. The cyclic compression-compression fatigue life of the metallic glass is about a factor of 10 higher than the cyclic tension-tension fatigue life at the same stress ratio. Based on these results, the damage and fracture mechanisms of the metallic glass induced by uniaxial and cyclic loading are elucidated.
部门归属	chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china. tech univ darmstadt, div phys met, dept mat & earth sci, d-64287 darmstadt, germany. inst met mat, d-01171 dresden, germany.;zhang, zf (reprint author), chinese acad sci, inst met res, natl lab mat sci, shenyang 110016, peoples r china;zhfzhang@imr.ac.cn
关键词	Mechanical-properties Crack-propagation Zr-ti Enhanced Plasticity Amorphous-alloys High-strength Hydrostatic-pressure Matrix Composites Flow Deformation
URL	查看原文
WOS记录号	WOS:000224743800015
引用统计	被引频次：87[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/321006/35736
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. F. Zhang,J. Eckert,L. Schultz. Fatigue and fracture behavior of bulk metallic glass[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2004,35A(11):3489-3498.
APA	Z. F. Zhang,J. Eckert,&L. Schultz.(2004).Fatigue and fracture behavior of bulk metallic glass.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,35A(11),3489-3498.
MLA	Z. F. Zhang,et al."Fatigue and fracture behavior of bulk metallic glass".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 35A.11(2004):3489-3498.