Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process

doi:10.1007/s10853-018-3081-y

IMR OpenIR

	Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process
	Xie, Jilin 1,2; Ma, Yingche 1; Xing, Weiwei 1; Ou, Meiqiong 1; Zhang, Long 1; Liu, Kui 1
通讯作者	Ma, Yingche() ; Liu, Kui(kliu@imr.ac.cn)
	2019-02-01
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	54 期号:4 页码:3558-3571
摘要	The microstructures and mechanical properties of gas tungsten arc-welded joints of superalloy K4750 that has been newly developed were examined. The microsegregation pattern during solidification of the fusion zone indicated that Fe was prone to segregate into the dendritic core, while Nb, Mo, Ti, W and Si were rejected into the dendritic boundary. The phase transformation sequence of the K4750 alloy fusion zone was LL+L+ +(Ti,Nb)C+(Ti,Nb)C. Heat-affected zone (HAZ) examination shows it consisted of partially melted zone with liquated MC carbides and liquated grain boundaries. Cracking-free HAZ microstructure suggested that K4750 alloy possess excellent HAZ cracking resistance properties. Relatively low concentration of Al and Ti results in the excellent cracking resistance properties of the alloy. Vickers microhardness of as-welded joint is lower than that of post-weld heat treatment (PWHT) joint across the whole joint due to the absence of 50nm spherical particles formed during PWHT. Tensile properties of as-welded joints are comparable to PWHT joints in terms of the ultimate tensile strength and elongation.
DOI	10.1007/s10853-018-3081-y
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000452502500063
出版者	SPRINGER
引用统计	被引频次：15[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/321006/130751
专题	中国科学院金属研究所
通讯作者	Ma, Yingche; Liu, Kui
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 Jinzhai Rd, Hefei, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Xie, Jilin,Ma, Yingche,Xing, Weiwei,et al. Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process[J]. JOURNAL OF MATERIALS SCIENCE,2019,54(4):3558-3571.
APA	Xie, Jilin,Ma, Yingche,Xing, Weiwei,Ou, Meiqiong,Zhang, Long,&Liu, Kui.(2019).Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process.JOURNAL OF MATERIALS SCIENCE,54(4),3558-3571.
MLA	Xie, Jilin,et al."Microstructure and mechanical properties of a new cast nickel-based superalloy K4750 joint produced by gas tungsten arc welding process".JOURNAL OF MATERIALS SCIENCE 54.4(2019):3558-3571.