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Segregation sequence of phosphorus and its effect on impact toughness of GH984G alloy during thermal exposure
Wu, Yunsheng1,2; Wang, Changshuai1,2; Qin, Xuezhi1,2; Hou, Jieshan1,2; Zhou, Lanzhang1,2
Corresponding AuthorWu, Yunsheng(yswu16b@imr.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
2022-05-01
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN2238-7854
Volume18Pages:200-209
AbstractThe 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.
KeywordGH984G alloy Phosphorus Segregation sequence Impact toughness Long-term thermal exposure
Funding OrganizationChina Postdoctoral Science Foundation ; National Natural Science Foundation of China
DOI10.1016/j.jmrt.2022.02.098
Indexed BySCI
Language英语
Funding ProjectChina Postdoctoral Science Foundation[2020M681000] ; National Natural Science Foundation of China[51971216] ; National Natural Science Foundation of China[51871213]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000803572800002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174225
Collection中国科学院金属研究所
Corresponding AuthorWu, Yunsheng; Zhou, Lanzhang
Affiliation1.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
Recommended Citation
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.
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