Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary

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	Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary
	L. L. Li; Z. J. Zhang; P. Zhang; Z. G. Wang; Z. F. Zhang
	2014
发表期刊	Nature Communications
ISSN	2041-1723
卷号	5
摘要	High-angle grain boundaries are always the preferential fatigue cracking sites, while the intrinsic fatigue cracking mechanism of coherent twin boundary remains elusive. Here we systematically investigate the fatigue cracking behaviours of copper bicrystals with a coherent twin boundary as their sole internal boundary. It is found with direct experimental evidence for the first time that, unlike the random grain boundaries, the cracking behaviour of the twin boundary strongly depends on its orientation with respect to the loading direction. When the twin boundary is parallel or perpendicular to the loading direction, the fatigue cracks nucleate along the slip bands preferentially; when it is inclined at an angle to the loading direction, the fatigue crack is especially apt to nucleate along the twin boundary first. The controllable fatigue cracking mechanisms of the twin boundary may provide new and important implications for the optimized interfacial design of the high-performance materials.
部门归属	[li, l. l. ; zhang, z. j. ; zhang, p. ; wang, z. g. ; 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	Electron Channeling Contrast Persistent Slip Bands High-cycle Fatigue Single-crystals Crystallographic Orientation Deformation Mechanisms Ultrahigh-strength Grain-boundaries Maximum Strength Metals
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/321006/72867
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. L. Li,Z. J. Zhang,P. Zhang,et al. Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary[J]. Nature Communications,2014,5.
APA	L. L. Li,Z. J. Zhang,P. Zhang,Z. G. Wang,&Z. F. Zhang.(2014).Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary.Nature Communications,5.
MLA	L. L. Li,et al."Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary".Nature Communications 5(2014).