Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure

doi:10.1016/j.jmrt.2022.02.098

IMR OpenIR

	Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure
	Wu, Yunsheng 1,2; Wang, Changshuai 1,2; Qin, Xuezhi 1,2; Hou, Jieshan 1,2; Zhou, Lanzhang 1,2
通讯作者	Wu, Yunsheng(yswu16b@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
	2022-05-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	18 页码:200-209
摘要	The segregation sequence of phosphorus and the influence on impact toughness of GH984G alloy, for the application of advanced ultra-super critical (A-USC) power plant, were studied during long-term thermal exposure at 700 ?. The results show that the segregation of phosphorus is associated with the phosphorus content and exposure time. Phosphorus atoms become rich around the MC carbides firstly, then segregates to the grain boundaries and twin boundaries in the form of solute P atoms with increasing phosphorus content and prolonging thermal exposure. Phosphorus can also exist around the MC carbides and at grain boundaries in the form of needle-like phosphide when the alloys with high P content are subjected to long-term thermal exposure. The impact toughness degradation of phosphorus-containing alloys is related to the phosphorus redistribution during thermal exposure. The segregation degree of phosphorus at grain boundaries rises with the increase of P content during thermal exposure. Excess phosphorus segregation at grain boundaries decreases the binding force of grain boundaries and results in the grain boundary embrittlement. Also, the needle-like phosphides around the MC carbides and at grain boundaries in high-phosphorus alloy induce the cracks initiation during impact. Hence, the impact toughness decreases with increasing phosphorus content after thermal exposure at 700 ?. (C) 2022 The Author(s). Published by Elsevier B.V.
关键词	GH984G alloy Phosphorus Segregation sequence Impact toughness Long-term thermal exposure
资助者	China Postdoctoral Science Foundation ; National Natural Science Foundation of China
DOI	10.1016/j.jmrt.2022.02.098
收录类别	SCI
语种	英语
资助项目	China Postdoctoral Science Foundation[2020M681000] ; National Natural Science Foundation of China[51971216] ; National Natural Science Foundation of China[51871213]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000803572800002
出版者	ELSEVIER
引用统计	被引频次：6[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/321006/174225
专题	中国科学院金属研究所
通讯作者	Wu, Yunsheng; Zhou, Lanzhang
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yunsheng,Wang, Changshuai,Qin, Xuezhi,et al. Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,18:200-209.
APA	Wu, Yunsheng,Wang, Changshuai,Qin, Xuezhi,Hou, Jieshan,&Zhou, Lanzhang.(2022).Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,18,200-209.
MLA	Wu, Yunsheng,et al."Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 18(2022):200-209.