Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy

doi:10.1088/2053-1591/ac5078

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	Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy
	Xie, Wencai 1,2; Wu, Dong 2; Lu, Shanping 2
刊名	MATERIALS RESEARCH EXPRESS
	2022-02-01
卷号	9 期号:2 页码:12
关键词	superalloy weld metal creep boron M23(C B)6
DOI	10.1088/2053-1591/ac5078
通讯作者	Wu, Dong(wudong@imr.ac.cn) ; Lu, Shanping(shplu@imr.ac.cn)
英文摘要	The role of boron in the creep properties and grain boundary characteristics in a new Ni-Fe-based weld metal suitable for advanced ultra-supercritical (A-USC) coal-fired power plant applications has been investigated. Ni-Fe-based filler wires without boron and boron-doped (50 ppm wt% boron) were prepared for this study. Boron-doped weld metals exhibited longer rupture lives and lower steady creep rates during the creep rupture tests at 750 degrees C / 380 MPa and 750 degrees C / 210 MPa. This study explains the improvement mechanism of boron on creep resistance from the perspective of the effect of boron on M23C6. Boron increased the nucleation rate of M23C6 and participated in the formation of M-23(C, B)(6) type boron-carbides. After creep deformation, boron still existed stably in the M-23(C, B)(6). The higher density of discrete M23C6 particles due to boron addition could restrain grain boundary crack propagation and grain boundary sliding, and thereby improve the creep fracture resistance of the GH984G weld metal at 750 degrees C / (380/ 210 MPa).
资助项目	National Natural Science Foundation of China[51901232]
WOS研究方向	Materials Science
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000759839700001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173387]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wu, Dong; Lu, Shanping
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xie, Wencai,Wu, Dong,Lu, Shanping. Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy[J]. MATERIALS RESEARCH EXPRESS,2022,9(2):12.
APA	Xie, Wencai,Wu, Dong,&Lu, Shanping.(2022).Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy.MATERIALS RESEARCH EXPRESS,9(2),12.
MLA	Xie, Wencai,et al."Effects of boron addition on the microstructure and creep properties of a Ni-Fe-based superalloy weld metal alloy".MATERIALS RESEARCH EXPRESS 9.2(2022):12.