Rotary bending high-cycle fatigue behavior of DD32 single crystal superalloy containing rhenium

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	Rotary bending high-cycle fatigue behavior of DD32 single crystal superalloy containing rhenium
	J. J. Yu; Y. H. Yang; X. F. Sun; H. R. Guan; Z. Q. Hu
	2012
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	47 期号:12 页码:4805-4812
摘要	Smooth and notched specimens of single crystal superalloy DD32 were subjected to rotary bending high-cycle fatigue (HCF) loading at different temperatures. The experimental results demonstrate that fatigue strengths of the smooth and notched specimens reach the maxima and the minimum notch sensitivity displays at 760 A degrees C. DD32 alloy exhibits excellent HCF properties compared to SRR99 alloy under the same test condition. As for the smooth specimens, slip bands moving through gamma and gamma' phases as well as dislocation bowing are the main deformation modes. As for the notched specimens, the deformations are carried out by dislocation loop bowing and shearing of PSBs mode at intermediate temperatures; at 900 A degrees C, the minimum fatigue strength results from dislocation climbing deformation and the degradation of gamma' precipitates. The fine secondary gamma' precipitates advantage the recovery of dislocations and further deformation of the fatigue specimens.
部门归属	[yu, jinjiang; yang, yanhong; sun, xiaofeng; guan, hengrong; hu, zhuangqi] chinese acad sci, inst met res, shenyang 110016, peoples r china.;yu, jj (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china.;jjyu@imr.ac.cn
关键词	Elevated-temperatures Crack-growth Base Superalloy Creep-behavior Stress Orientation Fracture Ambient Copper Alloy
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60419
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. J. Yu,Y. H. Yang,X. F. Sun,et al. Rotary bending high-cycle fatigue behavior of DD32 single crystal superalloy containing rhenium[J]. Journal of Materials Science,2012,47(12):4805-4812.
APA	J. J. Yu,Y. H. Yang,X. F. Sun,H. R. Guan,&Z. Q. Hu.(2012).Rotary bending high-cycle fatigue behavior of DD32 single crystal superalloy containing rhenium.Journal of Materials Science,47(12),4805-4812.
MLA	J. J. Yu,et al."Rotary bending high-cycle fatigue behavior of DD32 single crystal superalloy containing rhenium".Journal of Materials Science 47.12(2012):4805-4812.