Sigma phase formation and its effect on mechanical properties in the corrosion-resistant superalloy K44

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	Sigma phase formation and its effect on mechanical properties in the corrosion-resistant superalloy K44
	Hou, JS; Guo, JT; Zhou, LZ; Ye, HQ
通讯作者	Guo, JT()
	2006-02-01
发表期刊	ZEITSCHRIFT FUR METALLKUNDE
ISSN	0044-3093
卷号	97 期号:2 页码:174-181
摘要	The sigma phase (a) formation in long-term aged polycrystalline K44 superalloy has been studied as a function of aging temperature and time. The sigma phase in K44 alloy forms mainly in dendrite cores with a few at interdendritic regions. The kinetics of sigma formation can be described by the Johnson-Avrami-Mehl equation that yields activation eneraies of more than 130 U/mol in an early stage and less than 100 U/mol in steady state. Tensile experiments at room temperature and 1173 K and endurance experiments at 1173 K and 274 MPa were performed to test the effect of cy phases on these properties and no remarkable harmful effect is found. Moreover, the effect of long-term aging on the mechanical properties is realized mostly through the variation of gamma', not sigma phase formation.
关键词	sigma formation K44 alloy kinetics mechanical properties
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:000236898500012
出版者	CARL HANSER VERLAG
引用统计	被引频次：11[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/321006/86898
专题	中国科学院金属研究所
通讯作者	Guo, JT
作者单位	Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hou, JS,Guo, JT,Zhou, LZ,et al. Sigma phase formation and its effect on mechanical properties in the corrosion-resistant superalloy K44[J]. ZEITSCHRIFT FUR METALLKUNDE,2006,97(2):174-181.
APA	Hou, JS,Guo, JT,Zhou, LZ,&Ye, HQ.(2006).Sigma phase formation and its effect on mechanical properties in the corrosion-resistant superalloy K44.ZEITSCHRIFT FUR METALLKUNDE,97(2),174-181.
MLA	Hou, JS,et al."Sigma phase formation and its effect on mechanical properties in the corrosion-resistant superalloy K44".ZEITSCHRIFT FUR METALLKUNDE 97.2(2006):174-181.