Necking contributions to sigma-phase formation in a hot-corrosion-resistant superalloy during creep exposure

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	Necking contributions to sigma-phase formation in a hot-corrosion-resistant superalloy during creep exposure
	J. S. Hou; L. Z. Zhou; C. Yuan; J. T. Guo; W. Wang; X. Z. Qin; P. K. Liaw
	2013
发表期刊	Materials Characterization
ISSN	1044-5803
卷号	77 页码:47-52
摘要	Stress has been shown to accelerate the formation of the sigma phase in the experimental Ni-based superalloys during the high-temperature exposure. However, with the necking phenomenon occurring in strained-to-fractured specimens after the creep exposure at 1073 K/365 MPa for 1700 h, the stress decreases, while the amount of the sigma phase increases from the fracture face to the end of the fractured gauge section. Nucleation mechanisms of the a phase are discussed. The energy dynamics analysis indicates that the decrease of the sigma-phase density by necking is mainly due to the increased matrix strain energy, while the shape, size, and composition of the a phase are not affected by necking. (C) 2013 Elsevier Inc. All rights reserved.
部门归属	[hou, j. s. ; zhou, l. z. ; yuan, c. ; guo, j. t. ; wang, w. ; qin, x. z.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [liaw, p. k.] univ tennessee, dept mat sci & engn, knoxville, tn 37996 usa. ; hou, js (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; jshou@imr.ac.cn
关键词	Microstructure Necking Stress Rupture Superalloy Crystal Precipitation Stress
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71259
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. S. Hou,L. Z. Zhou,C. Yuan,et al. Necking contributions to sigma-phase formation in a hot-corrosion-resistant superalloy during creep exposure[J]. Materials Characterization,2013,77:47-52.
APA	J. S. Hou.,L. Z. Zhou.,C. Yuan.,J. T. Guo.,W. Wang.,...&P. K. Liaw.(2013).Necking contributions to sigma-phase formation in a hot-corrosion-resistant superalloy during creep exposure.Materials Characterization,77,47-52.
MLA	J. S. Hou,et al."Necking contributions to sigma-phase formation in a hot-corrosion-resistant superalloy during creep exposure".Materials Characterization 77(2013):47-52.