Microstructural evolution and micro-mechanical properties of non-isothermal solidified zone in TLP bonded Ni-based superalloy joints

doi:10.1016/j.jmst.2023.11.006

IMR OpenIR

	Microstructural evolution and micro-mechanical properties of non-isothermal solidified zone in TLP bonded Ni-based superalloy joints
	Zhang, Yi 1,2; Zhong, Yiming 1,2; Cheng, Yongxin 1,3; He, Neng 1,2; He, Lianlong 1; Gao, Zhenhuan 4; Gong, Xiufang 4; Chen, Chunlin 1,2,5; Ye, Hengqiang 5
通讯作者	Gong, Xiufang(gongxiufang@dongfang.com) ; Chen, Chunlin(clchen@imr.ac.cn)
	2024-06-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	185 页码:9-22
摘要	Transient liquid phase (TLP) bonding is a promising process for the joining and repairing of nickel-base superalloys. One of the most important parameters in TLP bonding is the bonding time required for sufficient isothermal solidification which prevents the formation of undesirable precipitated phases. In the present work, the effect of bonding time on the microstructure, type, and evolution of precipitates in the non-isothermal solidified zone (NSZ) and their effect on micro-mechanical properties were systematically investigated using multi-scale tests in TLP bonded Mar-M247 superalloy joints with Ni-15.2Cr-3.74B interlayer at 1230 degrees C. For a bonding time of 5 min, dual-phase M23(C, B)6 -gamma/gamma' (where M is a mix-ture of Hf, Ta, Cr, and Ni) with eutectic configuration was formed in NSZ. With the increase in bonding time, the evolution of NSZ microstructure can be summed up as eutectic M23(C, B)6 -gamma/gamma', semi-striping dual-phase M23(C, B)6 -gamma/gamma', discontinuously striping M23(C, B)6 -gamma/gamma', followed by the disintegration of NSZ. As the NSZ counterpart, the isothermal solidified zone (ISZ) is mainly composed of gamma/gamma'. Ac-companied by the dissolution of M23(C, B)6 in the centerline, the proportion of the ISZ increases greatly until the joints are completely occupied by ISZ. Finally, a bamboo-like structure with domain size of-100 mu m was formed in the joint centerline, along with gamma' reorganized themselves all into cubic shapes and distributed homogeneously. Mechanical property tests demonstrated that in comparison to samples with longer bonding time, the NSZ of the shortest bonding time (5 min) has the highest strength and a subsequent decrease in strength was observed with prolonging the bonding time and post-bond heat treatment. Furthermore, possible solidification/transformation path, segregation behavior, and formation mechanism of NSZ/ISZ evolution were discussed.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Ni-based superalloy TLP bonding Isothermal solidification M23 (C,B)6 FIB Micropillar compression Microhardness
资助者	National Natural Science Foundation of China ; Basic and Applied Basic Research Major Program of Guangdong Province, China ; Jihua Laboratory
DOI	10.1016/j.jmst.2023.11.006
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52125101] ; Basic and Applied Basic Research Major Program of Guangdong Province, China ; Jihua Laboratory ; [2021B0301030003] ; [X210141TL210]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001141855400001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：5[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/321006/183490
专题	中国科学院金属研究所
通讯作者	Gong, Xiufang; Chen, Chunlin
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 4.State Key Lab Long life High Temp Mat, Deyang 618000, Peoples R China 5.Ji Hua Lab, Foshan 528200, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yi,Zhong, Yiming,Cheng, Yongxin,et al. Microstructural evolution and micro-mechanical properties of non-isothermal solidified zone in TLP bonded Ni-based superalloy joints[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2024,185:9-22.
APA	Zhang, Yi.,Zhong, Yiming.,Cheng, Yongxin.,He, Neng.,He, Lianlong.,...&Ye, Hengqiang.(2024).Microstructural evolution and micro-mechanical properties of non-isothermal solidified zone in TLP bonded Ni-based superalloy joints.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,185,9-22.
MLA	Zhang, Yi,et al."Microstructural evolution and micro-mechanical properties of non-isothermal solidified zone in TLP bonded Ni-based superalloy joints".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 185(2024):9-22.