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Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy
Wang, Changshuai1; Chen, Jiamin1,2; Zeng, Fanwei3; Wu, Yunsheng1; Guo, Jianting1; Zhou, Lanzhang1
Corresponding AuthorWang, Changshuai(cswang@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
2020-09-23
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume795Pages:10
AbstractGH984G alloy is a precipitate-strengthened Ni-Fe based alloy considered as boiler materials in next generation of advanced ultra-supercritical (A-USC) coal fired power plant. In this paper, the effect of Nb/(Ti + Al) ratio on the phase stability and tensile properties of GH984G alloy was investigated. Detailed investigations reveal that the major precipitates of the alloys with different Nb/(Ti + Al) ratios are all gamma', MC and M23C6. The higher Nb/(Ti + Al) ratio retards gamma' nucleation. During thermal exposure, gamma' coarsening behavior of the alloys with different Nb/ (Ti + Al) ratios all follows Ostwald ripening kinetics. However, the higher Nb/(Ti + Al) ratio accelerates gamma' coarsening at early stage, but its influence decreases with increasing thermal exposure time. The reasons are attributed to the influence of Nb/(Ti + Al) ratio on gamma/gamma' misfit and the diffusion behavior of gamma' forming elements. The thermal stability of MC carbide and the precipitation and growth of M23C6 carbide are no dependence on Nb/(Ti + Al) ratio. During thermal exposure, the higher Nb/(Ti + Al) ratio has a negative effect on yield strength, but its influence decreases with increasing thermal exposure time. The reasons are attributed to the influence of Nb/(Ti + Al) ratio on the precipitation behavior of gamma' phase. In addition, Nb/(Ti + Al) ratio has no notable influence on ductility and fracture behavior.
KeywordNi-Fe based Alloy Nb/(Ti plus Al) ratio gamma ' phase Carbides Tensile properties
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; LiaoNing Revitalization Talents Program ; National Science and Technology Major Project of China
DOI10.1016/j.msea.2020.139980
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFB0305204] ; National Natural Science Foundation of China[51971216] ; National Natural Science Foundation of China[51301171] ; LiaoNing Revitalization Talents Program[XLYC1807038] ; National Science and Technology Major Project of China[2017.-0018-0090]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000573276900002
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140777
Collection中国科学院金属研究所
Corresponding AuthorWang, Changshuai; Zhou, Lanzhang
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.Dongfang Boiler Grp Co Ltd, Zigong 643001, Peoples R China
Recommended Citation
GB/T 7714
Wang, Changshuai,Chen, Jiamin,Zeng, Fanwei,et al. Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,795:10.
APA Wang, Changshuai,Chen, Jiamin,Zeng, Fanwei,Wu, Yunsheng,Guo, Jianting,&Zhou, Lanzhang.(2020).Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,795,10.
MLA Wang, Changshuai,et al."Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 795(2020):10.
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