Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy

doi:10.1016/j.msea.2020.139980

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of Nb/(Ti plus Al) ratio on the phase stability and tensile properties of GH984G alloy
	Wang, Changshuai 3; Chen, Jiamin 1,3; Zeng, Fanwei 2; Wu, Yunsheng 3; Guo, Jianting 3; Zhou, Lanzhang 3
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-09-23
卷号	795 页码:10
关键词	Ni-Fe based Alloy Nb/(Ti plus Al) ratio gamma ' phase Carbides Tensile properties
ISSN号	0921-5093
DOI	10.1016/j.msea.2020.139980
通讯作者	Wang, Changshuai(cswang@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
英文摘要	GH984G 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.
资助项目	National 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研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000573276900002
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140776]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Changshuai; Zhou, Lanzhang
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Dongfang Boiler Grp Co Ltd, Zigong 643001, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 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.