Fatigue crack initiation at Nd-rich particles in an Nd containing high temperature titanium alloy

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	Fatigue crack initiation at Nd-rich particles in an Nd containing high temperature titanium alloy
	J. F. Lei; Q. J. Wang; Y. Y. Liu; S. X. Guan; Z. G. Wang; D. Li; Z. Q. Hu
	1997
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	12 期号:10 页码:2571-2574
摘要	Scanning electron microscopy (SEM) and surface replica method have been employed to study the micromechanism of fatigue crack initiation at Nd-rich phase particles in a high temperature titanium (Ti-55) alloy. It was found that the microcrack initiates near the equator of Nd-rich particles in the matrix. The microcrack grows first at an angle of about 45 degrees with respect to the tensile axis, and then its growth direction becomes approximately normal to the tensile axis. The experimental results are analyzed in terms of the elastic stress distribution around soft particles imbedded in the matrix to account for the experimental findings of particle cracking and the associated surface microcrack initiation near the particle ''equator.'' A model of fatigue crack initiation at a soft surface particle is proposed.
部门归属	lei, jf (reprint author), acad sinica,inst met res,state key lab fagigue & fracture mat,shenyang 110015,peoples r china
关键词	Inclusions
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37990
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. F. Lei,Q. J. Wang,Y. Y. Liu,et al. Fatigue crack initiation at Nd-rich particles in an Nd containing high temperature titanium alloy[J]. Journal of Materials Research,1997,12(10):2571-2574.
APA	J. F. Lei.,Q. J. Wang.,Y. Y. Liu.,S. X. Guan.,Z. G. Wang.,...&Z. Q. Hu.(1997).Fatigue crack initiation at Nd-rich particles in an Nd containing high temperature titanium alloy.Journal of Materials Research,12(10),2571-2574.
MLA	J. F. Lei,et al."Fatigue crack initiation at Nd-rich particles in an Nd containing high temperature titanium alloy".Journal of Materials Research 12.10(1997):2571-2574.