Influence of precompression treatment on creep deformation mechanism of a single crystal nickel base superalloy

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	Influence of precompression treatment on creep deformation mechanism of a single crystal nickel base superalloy
	Shui Li ; Jin Tao ; Tian Sugui ; Hu Zhuangqi
刊名	ACTA METALLURGICA SINICA
	2007
卷号	43 期号:1 页码:47-52
关键词	Ni base single crystal superalloy precompression treatment tensile creep dislocation
ISSN号	0412-1961
通讯作者	Shui Li(dcbsy@yahoo.com.cn)
英文摘要	P-type rafted structure of a nickel base single crystal superalloy with [001] orientation was obtained by compressive creep, and then tensile creep tests were performed to compare in more detail the creep behaviors of the rafted (precompression) and cuboidal (as-heat treated) gamma' microstructures. The experimental results showed that during creeping at 800 degrees C and 600 MPa, the alloy with the P-type structure has much higher strain of primary creep and steady state creep rate, and so the rupture lives were shorter. TEM examination of the sample with the P-type structure indicated that, in addition to {111}< 110 >-slip system operated in gamma matrix, the gamma' precipitates were cut by some superlattice dislocations and a few stacking fault. At low stress of 200 MPa and temperature range from 980 degrees C to 1020 degrees C, the glide-climb process along gamma/gamma' interfaces was impeded most efficiently by P-type rafted structure, the alloy exhibited a lower minimum creep rates and longer rupture lives. It is deduced that the tensile creep strength of the alloy is improved by suitable precompression treatment under high temperature and low stress condition.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000244315000009
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/90001]
专题	金属研究所_中国科学院金属研究所
通讯作者	Shui Li
作者单位	1.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110168, Peoples R China 2.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 3.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110023, Peoples R China
推荐引用方式 GB/T 7714	Shui Li,Jin Tao,Tian Sugui,et al. Influence of precompression treatment on creep deformation mechanism of a single crystal nickel base superalloy[J]. ACTA METALLURGICA SINICA,2007,43(1):47-52.
APA	Shui Li,Jin Tao,Tian Sugui,&Hu Zhuangqi.(2007).Influence of precompression treatment on creep deformation mechanism of a single crystal nickel base superalloy.ACTA METALLURGICA SINICA,43(1),47-52.
MLA	Shui Li,et al."Influence of precompression treatment on creep deformation mechanism of a single crystal nickel base superalloy".ACTA METALLURGICA SINICA 43.1(2007):47-52.