Primary carbide evolution and homogenization behavior of a novel Fe-Ni-based superalloy for advanced nuclear reactor

doi:10.1016/j.matchar.2024.114706

IMR OpenIR

	Primary carbide evolution and homogenization behavior of a novel Fe-Ni-based superalloy for advanced nuclear reactor
	Wu, Jinrong 1,2,3; Wang, Jiaqi 1,2,3; Zhao, Zhipeng 4; Guan, Xianjun 2,3; Wu, Yunsheng 2,3,6; Qin, Xuezhi 2,3,5,6; Zhou, Lanzhang 2,3,6
通讯作者	Wu, Yunsheng(yswu16b@imr.ac.cn) ; Qin, Xuezhi(xzqin@nimte.ac.cn) ; Zhou, Lanzhang(lzz@imr.ac.cn)
	2025-03-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	221 页码:13
摘要	In order to enhance the hot working property of the as-cast superalloy and regulate the precipitation of nanoscale MC carbides in subsequent processes, the elemental segregation and primary carbide evolution behavior of a novel Fe-Ni-based superalloy designed for Generation-IV (Gen-IV) advanced nuclear reactors are investigated in detail during homogenization treatment. The study reveals that Nb and Mo exhibited the greatest segregation in the interdendritic regions of the as-cast microstructure. Primary carbides encompass flocculent, Nb-rich blocky MC carbides alongside a minor quantity of Zr-rich blocky MC carbides. During homogenization, the thermal stability of flocculent carbides is lowest, followed by Nb-rich blocky MC carbides, while the thermal stability of Zr-rich MC carbides is highest. With the diffusion of Nb elements, Nb-rich blocky MC carbides transform into Zr-rich residual granular MC carbides. The crystallographic orientation of Zr-rich residual MC carbides is identical to that of primary Nb-rich MC carbides. Furthermore, the diffusion activation energy Q for Nb and Mo is calculated to be 327.26 kJ/mol and 312.98 kJ/mol, and the diffusion constant D-0 for Nb and Mo is calculated to be 2.59 x 10(-3) m(2)/s and 0.56 x 10(-3) m(2)/s, respectively. By establishing the diffusion kinetic equations of Nb and Mo, combined with the experimental results, it is determined that the homogenization treatment of the new Fe-Ni-based superalloy at 1220 degrees C for 20 h can effectively reduce elemental segregation, dissolve primary coarse MC carbides, and promote the precipitation of secondary nano-scale MC carbides in the forging structure to refine grains.
关键词	MC carbides Fe-Ni-based superalloy Homogenization Diffusion kinetics
资助者	LingChuang Research Project of China National Nuclear Corporation, Science and Technology Innovation 2025 Major Project of Ningbo ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation
DOI	10.1016/j.matchar.2024.114706
收录类别	SCI
语种	英语
资助项目	LingChuang Research Project of China National Nuclear Corporation, Science and Technology Innovation 2025 Major Project of Ningbo[2022Z199] ; National Natural Science Foundation of China[U23A6016] ; China Postdoctoral Science Foundation[2023M743570]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001409207000001
出版者	ELSEVIER SCIENCE INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180004
专题	中国科学院金属研究所
通讯作者	Wu, Yunsheng; Qin, Xuezhi; Zhou, Lanzhang
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, PR, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, PR, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72,Wenhua Rd, Shenyang 110016, PR, Peoples R China 4.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, PR, Peoples R China 5.Ningbo Inst Mat Technol & Engn, Chinese Acad Sci, Ningbo 315201, PR, Peoples R China 6.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, PR, Peoples R China
推荐引用方式 GB/T 7714	Wu, Jinrong,Wang, Jiaqi,Zhao, Zhipeng,et al. Primary carbide evolution and homogenization behavior of a novel Fe-Ni-based superalloy for advanced nuclear reactor[J]. MATERIALS CHARACTERIZATION,2025,221:13.
APA	Wu, Jinrong.,Wang, Jiaqi.,Zhao, Zhipeng.,Guan, Xianjun.,Wu, Yunsheng.,...&Zhou, Lanzhang.(2025).Primary carbide evolution and homogenization behavior of a novel Fe-Ni-based superalloy for advanced nuclear reactor.MATERIALS CHARACTERIZATION,221,13.
MLA	Wu, Jinrong,et al."Primary carbide evolution and homogenization behavior of a novel Fe-Ni-based superalloy for advanced nuclear reactor".MATERIALS CHARACTERIZATION 221(2025):13.