Microstructural characteristics and mechanical properties of a Mo modified Ni-Fe-Cr based alloy

IMR OpenIR

	Microstructural characteristics and mechanical properties of a Mo modified Ni-Fe-Cr based alloy
	Wang, CS; Guo, YG; Guo, JT; Zhou, LZ; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
	2016-10-15
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	675 页码:314-322
摘要	The effects of Mo content on the microstructural characteristics and mechanical properties of a Ni-Fe-Cr based alloy with low gamma prime (gamma') volume fraction, considered as boiler materials in 700 degrees C advanced ultra-supercritical (A-USC) coal-fired power plants, were studied in this paper. Detailed investigations reveal that the alloys with different Mo contents have similar microstructural characteristics, except the gamma-gamma' misfit after standard heat treatment. The major precipitates of the alloys are all spherical gamma', blocky MC and discrete M23C6. During long-term thermal exposure at 700-750 degrees C, the variation of Mo content has no notable influence on primary MC degeneration, precipitation and growth of M23C6 carbide. The coarsening behavior of gamma' phase of the alloys with different Mo contents all follows Ostwald ripening kinetics. The higher Mo content can decrease gamma' coarsening rate due to the increase of the activation energy for gamma' coarsening. After standard heat treatment, the tensile properties of the alloys with different Mo contents are almost same. However, the stress rupture life increases significantly with increasing Mo content, but the ductility has no obvious change. The effects of Mo on the diffusion processes, the stacking fault energy and gamma-gamma' misfit are assumed to cause the increase of the stress rupture life. (C) 2016 Elsevier B.V. All rights reserved.
部门归属	[wang, changshuai ; guo, yongan ; guo, jianting ; zhou, lanzhang] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Ni-fe-cr Based Alloy Gamma ' Phase Carbides Mechanical Properties Mo
学科领域	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China, China [51301171]; National Energy Administration Program of China [NY20150102]; fund of the State Key Laboratory of Solidification Processing in NWPU [SKLSP201512]
收录类别	sci
语种	英语
WOS记录号	WOS:000384383700033
引用统计	被引频次：31[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/321006/76235
专题	中国科学院金属研究所
通讯作者	Wang, CS; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Wang, CS,Guo, YG,Guo, JT,et al. Microstructural characteristics and mechanical properties of a Mo modified Ni-Fe-Cr based alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,675:314-322.
APA	Wang, CS,Guo, YG,Guo, JT,Zhou, LZ,&Zhou, LZ .(2016).Microstructural characteristics and mechanical properties of a Mo modified Ni-Fe-Cr based alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,675,314-322.
MLA	Wang, CS,et al."Microstructural characteristics and mechanical properties of a Mo modified Ni-Fe-Cr based alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 675(2016):314-322.