Effect of PWHT on microstructure and mechanical properties of welded joint of a new Fe-Ni-based superalloy

doi:10.1016/j.msea.2024.146699

IMR OpenIR

	Effect of PWHT on microstructure and mechanical properties of welded joint of a new Fe-Ni-based superalloy
	Huang, Yeshun 1,2; Zhang, Rui 1; Wang, Fuqiang 3; Zhou, Zijian 1; Zhang, Peng 4; Yan, Jingbo 4; Yuan, Yong 4; Gu, Yuefeng 5; Cui, Chuanyong 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
通讯作者	Cui, Chuanyong(chycui@imr.ac.cn)
	2024-07-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	906 页码:14
摘要	In this study, the effect post weld heat treatment (PWHT) on microstructural evolution and mechanical properties of weld metal of HT700P alloy with Inconel 617 filler metal was investigated. After welding, columnar grain, dendritic microstructure and segregation of Mo, Co and Ti elements related to the equilibrium distribution coefficient were observed in the weld metal. The PWHT was conducted in both direct-aging treatment with different time and solution treatment with different cooling methods. The results showed that direct-aging treatment had a limit impact on homogenization of weld metal, while microstructural homogenization and elemental segregation were significantly improved after solution treatment and massive M6C and M23C6 carbides precipitated at the grain boundaries and interdendritic region of weld metal. It was found that the elongation at 700 degrees C of welded joints after solution treatment was relatively increased, which was related to the decrease of residual stress and the precipitation of Mo-rich carbides at the grain boundaries. The fracture occurred in the weld metal presented interdendritic fracture characteristics, and the fracture mechanism for stress relaxation cracking was the strong grain interior induced by the precipitation of gamma ' phase, leading to the stress concentration and nucleation of cavities at grain boundaries. After solution treatment, the creep lifetime of furnace cooling was much greater than that of water quenching. The superior creep properties of furnace-cooled joint could be attributed to the lower residual stress and the migration of carbon element in the fusion line, which inhibited the nucleation and aggregation of cavities in the partially melted zone.
关键词	Fe-Ni-based superalloy Post weld heat treatment Tensile behavior Stress relaxation cracking Creep properties
资助者	National Key R & D Program of China ; Research and Development Funds of Xi'an Thermal Power Research Institute Co., Ltd. ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China
DOI	10.1016/j.msea.2024.146699
收录类别	SCI
语种	英语
资助项目	National Key R & D Program of China[2019YFA0705300] ; National Key R & D Program of China[2021YFB3700600] ; Research and Development Funds of Xi'an Thermal Power Research Institute Co., Ltd.[TA-20-TYK03] ; Innovation Program of Institute of Metal Research, Chinese Academy of Sciences[2021-PY09] ; National Natural Science Foundation of China[92060102] ; Natural Science Basic Research Plan in Shaanxi Province of China[2022JQ-314]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001255675900001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：4[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/321006/187458
专题	中国科学院金属研究所
通讯作者	Cui, Chuanyong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Shenyang Aircraft Ind Grp Co Ltd, Shenyang 110850, Peoples R China 4.Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China 5.Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
推荐引用方式 GB/T 7714	Huang, Yeshun,Zhang, Rui,Wang, Fuqiang,et al. Effect of PWHT on microstructure and mechanical properties of welded joint of a new Fe-Ni-based superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,906:14.
APA	Huang, Yeshun.,Zhang, Rui.,Wang, Fuqiang.,Zhou, Zijian.,Zhang, Peng.,...&Sun, Xiaofeng.(2024).Effect of PWHT on microstructure and mechanical properties of welded joint of a new Fe-Ni-based superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,906,14.
MLA	Huang, Yeshun,et al."Effect of PWHT on microstructure and mechanical properties of welded joint of a new Fe-Ni-based superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 906(2024):14.