Cyclic deformation and fatigue crack propagation of a Zr-based bulk amorphous metal

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	Cyclic deformation and fatigue crack propagation of a Zr-based bulk amorphous metal
	H. Zhang ; Z. G. Wang ; K. Q. Qiu ; Q. S. Zang ; H. F. Zhang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	2003
卷号	356 期号:1-2 页码:173-180
关键词	bulk amorphous metals cyclic deformation cyclic strain response fatigue crack propagation Paris power-law crystalline phases constitutive behavior fracture-toughness ni-fe glass mechanisms alloys growth
ISSN号	0921-5093
中文摘要	The behavior of the cyclic deformation and fatigue crack propagation Of Zr41.25Ti13.75Ni10Cu12.5Be22.5 (in at.%) bulk amorphous metals is investigated. Both fully amorphous and partially crystallized metals are characterized in order to understand the fatigue behavior of these different microstructures. Under fully reversed load control, both amorphous metals show stable cyclic strain response until final fracture. The partially crystallized metal shows an inferior fatigue resistance in comparison with that of the fully amorphous metal. The absence of definite crystalline microstructure in the amorphous metal and a relatively small area of stable crack propagation on the fracture surface are main reasons for the stable strain response under cyclic deformation. Similar to the ductile crystalline alloys, the fatigue crack propagation of both amorphous metals obeys Paris power-law relationship at intermediate growth rates. Both fully amorphous and partially crystallized metals show a similar law of fatigue crack propagation in that their values of threshold and fatigue exponents m are comparable. The mechanisms of fatigue crack propagation in the region of near-threshold and intermediate crack growth are similar to that of ductile crystalline alloys. The crystalline phases in the partially crystallized metals can retard the crack or act as sites of crack initiation when they are oriented at a suitable direction for that of crack propagation. (C) 2003 Elsevier Science B.V. All rights reserved.
原文出处	://WOS:000184399000022
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36157]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Zhang,Z. G. Wang,K. Q. Qiu,et al. Cyclic deformation and fatigue crack propagation of a Zr-based bulk amorphous metal[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2003,356(1-2):173-180.
APA	H. Zhang,Z. G. Wang,K. Q. Qiu,Q. S. Zang,&H. F. Zhang.(2003).Cyclic deformation and fatigue crack propagation of a Zr-based bulk amorphous metal.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,356(1-2),173-180.
MLA	H. Zhang,et al."Cyclic deformation and fatigue crack propagation of a Zr-based bulk amorphous metal".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 356.1-2(2003):173-180.