Resistant stress for creep in cast nickel-base superalloys

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	Resistant stress for creep in cast nickel-base superalloys
	Yuan, C ; Guo, JT ; Yang, HC
刊名	ACTA METALLURGICA SINICA
	2002-11-01
卷号	38 期号:11 页码:1149-1156
关键词	cast nickel-base superalloy creep mechanism resistant stress
ISSN号	0412-1961
通讯作者	Yuan, C()
英文摘要	On the basis of reviewing briefly the particle hardening theories and various dislocation creep theories, a modified dislocation creep model was proposed, in which the resistant stress is a key factor to creep mechanism. When applied stress is high enough for the dislocations to cut into the gamma' particles, it is thought that creep deformation is mainly controlled by the particle cutting mechanism, and the resistant stress is almost a constant, which is irrelative to the size of gamma' particles and applied stress. At low applied stress, it is suggested that creep deformation is mainly controlled by the dislocations climb mechanism. In this case, the resistant stress has two components: a threshold stress term defined by the minimum stress required for various climb mechanism, and a friction stress term represented by the contribution of solid-solution strengthening and dislocation strengthening, which is strongly dependent on applied stress. Finally, the model is verified in three cast nickel-base superalloys such as DS DZ17G, cast IN100, and IN738. The results of detailed calculations in terms of SL theory are in good agreement with the experimental data.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000179827800005
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/115754]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yuan, C
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Coll Mat & Met, Shenyang 110004, Peoples R China
推荐引用方式 GB/T 7714	Yuan, C,Guo, JT,Yang, HC. Resistant stress for creep in cast nickel-base superalloys[J]. ACTA METALLURGICA SINICA,2002,38(11):1149-1156.
APA	Yuan, C,Guo, JT,&Yang, HC.(2002).Resistant stress for creep in cast nickel-base superalloys.ACTA METALLURGICA SINICA,38(11),1149-1156.
MLA	Yuan, C,et al."Resistant stress for creep in cast nickel-base superalloys".ACTA METALLURGICA SINICA 38.11(2002):1149-1156.