Effects of pre-compression on the stress rupture properties of Ni base single crystal superalloy DD98 and its mechanism

IMR OpenIR

	Effects of pre-compression on the stress rupture properties of Ni base single crystal superalloy DD98 and its mechanism
	Liu Jinlai; Jin Tao; Sun Xiaofeng; Zhang Jinghua; Guan Hengrong; Hu Zhuangqi
通讯作者	Liu Jinlai(jlliu@imr.ac.cn)
	2006-08-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	42 期号:8 页码:843-849
摘要	The effects of uniaxial pre-compressions in vacuum at 1050 degrees C by 180 MPa/6 h and 220 MPa/6 h on the microstructure and stress rupture properties of single crystal superalloy DD98 were investigated. It is shown that P-type gamma' raft parallel to stress formed during pre-compression. Moreover, dislocation networks appeared on gamma/gamma' interface in vertical channels. The effect on stress rupture lifetime varied with the test conditions, but the pre-compression increased the elongations under all test conditions. Under high-temperature and low-stress, the pre-compression made P-type raft transform into wave-like N-type raft with different widths in two samples, and dislocations overpass gamma' particles by different means. Under low-temperature and high-stress the P-type raft showed only a slight tendency to transform into N-type one, and the entangled dislocations appeared in two precompressed samples after stress rupture. Under intermediate temperature and stress, the P-type raft can still transform into N-type one but very irregular, and the dislocations formed irregular networks.
关键词	Ni base single crystal superalloy pre-compression stress rupture rafting dislocation
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000240294200012
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：2[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/321006/87956
专题	中国科学院金属研究所
通讯作者	Liu Jinlai
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu Jinlai,Jin Tao,Sun Xiaofeng,et al. Effects of pre-compression on the stress rupture properties of Ni base single crystal superalloy DD98 and its mechanism[J]. ACTA METALLURGICA SINICA,2006,42(8):843-849.
APA	Liu Jinlai,Jin Tao,Sun Xiaofeng,Zhang Jinghua,Guan Hengrong,&Hu Zhuangqi.(2006).Effects of pre-compression on the stress rupture properties of Ni base single crystal superalloy DD98 and its mechanism.ACTA METALLURGICA SINICA,42(8),843-849.
MLA	Liu Jinlai,et al."Effects of pre-compression on the stress rupture properties of Ni base single crystal superalloy DD98 and its mechanism".ACTA METALLURGICA SINICA 42.8(2006):843-849.