Research on laser welding of cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft

doi:10.1016/j.jallcom.2006.11.152

IMECH-IR > 力学所知识产出(1956-2008)

	Research on laser welding of cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft
	Liu XB(刘秀波); Yu G(虞钢); Guo J(郭建); Gu YJ(谷亦杰); Pang M(庞铭); Zheng CY(郑彩云); Wang HH(王恒海); Yu G
发表期刊	Journal of Alloys and Compounds
	2008
卷号	453 期号:1-2 页码:371-378
ISSN	0925-8388
摘要	Exploratory experiments of laser welding cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft were conducted. Microstructure of the welded seam was characterized by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectrometer (EDS). Mechanical properties of the welded seam were evaluated by microhardness and tensile strength testing. The corresponding mechanisms were discussed in detail. Results showed that the laser-welded seam had non-equilibrium solidified microstructures consisting of FeCr0.29Ni0.16C0.06 austenite solid solution dendrites as the dominant and some fine and dispersed Ni3Al gamma' phase and Laves particles as well as little amount of MC short stick or particle-like carbides distributed in the interdendritic regions. The average microhardness of the welded seam was relatively uniform and lower than that of the base metal due to partial dissolution and suppression of the strengthening phase gamma' to some extent. About 88.5% tensile strength of the base metal was achieved in the welded joint because of a non-full penetration welding and the fracture mechanism was a mixture of ductility and brittleness. The existence of some Laves particles in the welded seam also facilitated the initiation and propagation of the microcracks and microvoids and hence, the detrimental effects of the tensile strength of the welded joint. The present results stimulate further investigation on this field. (c) 2006 Elsevier B.V. All rights reserved.
关键词	Laser Welding Welded Seam Microstructure Mechanical Properties Nd-yag Laser Tensile Properties Microstructure Aluminum
DOI	10.1016/j.jallcom.2006.11.152
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000254899700067
关键词[WOS]	ND-YAG LASER; TENSILE PROPERTIES; MICROSTRUCTURE; ALUMINUM
WOS类目	Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/26074
专题	力学所知识产出(1956-2008)
通讯作者	Yu G
推荐引用方式 GB/T 7714	Liu XB,Yu G,Guo J,et al. Research on laser welding of cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft[J]. Journal of Alloys and Compounds,2008,453,1-2,:371-378.
APA	Liu XB.,Yu G.,Guo J.,Gu YJ.,Pang M.,...&Yu G.(2008).Research on laser welding of cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft.Journal of Alloys and Compounds,453(1-2),371-378.
MLA	Liu XB,et al."Research on laser welding of cast Ni-based superalloy K418 turbo disk and alloy steel 42CrMo shaft".Journal of Alloys and Compounds 453.1-2(2008):371-378.

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