Enhancement of multi-pass weld-crack resistance of Co-based superalloys by B-doping

doi:10.1016/j.matchar.2021.111527

IMR OpenIR

	Enhancement of multi-pass weld-crack resistance of Co-based superalloys by B-doping
	Wen, Mingyue 1,2; Sun, Yuan 1; Yu, Jinjiang 1; Meng, Jie 1; Wang, Shiyang 1; Dong, Zhiguo 3; Niu, Juntao 3; Sun, Xiaofeng 1; Zhou, Yizhou 1
通讯作者	Yu, Jinjiang(jjyu@imr.ac.cn) ; Meng, Jie(jmeng@imr.ac.cn)
	2021-12-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	182 页码:10
摘要	Enhancing weld-crack resistance of Co-based suerpalloys is of both scientific and practical significance. In this work, the fusion zone weld-crack resistance of Co-9.2Al-9 W-xB (at.%, x = 0, 0.05, 0.20) superalloys during multi-pass fusion welding is investigated. It is found that weld cracks form in fusion zone without B-doping and with B-doping of 0.20%. However, no cracks form in the welded superalloy with 0.05% B alloys, suggesting the weld-crack resistance of Co-based superalloys can be enhanced by a small amount of B-doping. The mechanisms underlying the different weldability of the three Co-based superalloys are clarified. With B-doping of 0.05 at.%, the precipitation of mu-Co7W6 phase on grain boundaries can be fully suppressed, and the internal residual stress is largely reduced. The suppression of precipitated phases and low internal stress in the superalloy with 0.05% B doping account for its much enhanced weld-crack resistance. However, with further B-doping of 0.20%, the M3B2 phase precipitates on the grain boundaries and the internal stress inside grains also increases, which account for the further deterioration of weldabilty. These findings are believed to promote the development of Co-based superalloys with high weld-crack resistance.
关键词	Weld-crack resistance Co-based superalloy B-doping Fusion welding Weldability
DOI	10.1016/j.matchar.2021.111527
收录类别	SCI
语种	英语
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:000711216000003
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：1[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/321006/167114
专题	中国科学院金属研究所
通讯作者	Yu, Jinjiang; Meng, Jie
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.AVIC Shenyang Engine Design & Res Inst, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Wen, Mingyue,Sun, Yuan,Yu, Jinjiang,et al. Enhancement of multi-pass weld-crack resistance of Co-based superalloys by B-doping[J]. MATERIALS CHARACTERIZATION,2021,182:10.
APA	Wen, Mingyue.,Sun, Yuan.,Yu, Jinjiang.,Meng, Jie.,Wang, Shiyang.,...&Zhou, Yizhou.(2021).Enhancement of multi-pass weld-crack resistance of Co-based superalloys by B-doping.MATERIALS CHARACTERIZATION,182,10.
MLA	Wen, Mingyue,et al."Enhancement of multi-pass weld-crack resistance of Co-based superalloys by B-doping".MATERIALS CHARACTERIZATION 182(2021):10.