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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
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume675Pages:314-322
AbstractThe 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.
description.department[wang, changshuai ; guo, yongan ; guo, jianting ; zhou, lanzhang] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordNi-fe-cr Based Alloy Gamma ' Phase Carbides Mechanical Properties Mo
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational 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]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76235
Collection中国科学院金属研究所
Corresponding AuthorWang, CS; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
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.
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