Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy

doi:10.1007/s12598-011-0327-0

IMR OpenIR

	Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy
	Xia Pengcheng 1,2; Yang Lei 1; Yu Jinjiang 2; Sun Xiaofeng 2; Guan Hengrong 2; Hu Zhuangqi 2
通讯作者	Xia Pengcheng(xpc328@126.com)
	2011-03-01
发表期刊	RARE METALS
ISSN	1001-0521
卷号	30 页码:472-476
摘要	Thermal fatigue property of a directionally solidified nickel base superalloy at the condition of different notched orientation and upper temperatures was investigated. The results show that cycle numbers of crack initiation decrease, propagation rate of crack increases and resistance of thermal fatigue reduces with the rise of upper temperature. Thermal fatigue property of the specimen with the notched direction vertical to orientation of dendrite growth (DZ319T) is superior to that of the specimen with the notched direction parallel to orientation of dendrite growth (DZ319L). DZ319L alloy initiates thermal fatigue crack by carbide and propagates along the direction of carbide distribution, which resultes in big propagation rate and poor thermal fatigue property. Crack initiation of DZ319T alloy is mainly by oxidized cavity. The join of oxidized cavity makes crack propagate. There are two cracks in DZ319T alloy, which greatly drops the stress concentration near the notch and decreases the propagation rate of crack. DZ319T alloy has excellent thermal fatigue property.
关键词	directionally solidified nickel base superalloy notched direction thermal fatigue crack initiation and propagation
资助者	National Basic Research Program (973 Program) ; National Natural Science Foundation of China (NSFC)
DOI	10.1007/s12598-011-0327-0
收录类别	SCI
语种	英语
资助项目	National Basic Research Program (973 Program)[2010CB631200 (2010CB631206)] ; National Natural Science Foundation of China (NSFC)[50931004]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000303126300101
出版者	NONFERROUS METALS SOC CHINA
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/105505
专题	中国科学院金属研究所
通讯作者	Xia Pengcheng
作者单位	1.Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266510, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xia Pengcheng,Yang Lei,Yu Jinjiang,et al. Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy[J]. RARE METALS,2011,30:472-476.
APA	Xia Pengcheng,Yang Lei,Yu Jinjiang,Sun Xiaofeng,Guan Hengrong,&Hu Zhuangqi.(2011).Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy.RARE METALS,30,472-476.
MLA	Xia Pengcheng,et al."Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy".RARE METALS 30(2011):472-476.