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
刊名	Journal of Materials Science
	2012
卷号	47 期号:12 页码:4805-4812
关键词	elevated-temperatures crack-growth base superalloy creep-behavior stress orientation fracture ambient copper alloy
ISSN号	0022-2461
中文摘要	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.
原文出处	://WOS:000302245300003
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60419]
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	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.