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Title:
Microstructure Study Of Laser Welding Cast Nickel-Based Superalloy K418
Author: Pang M(庞铭); Yu G(虞钢); Wang HH(王恒海); Zheng CY(郑彩云)
Source: Journal of Materials Processing Technology
Issued Date: 2008
Volume: 207, Issue:1-3, Pages:271-275
Abstract: Experiments of laser welding cast nickel-based superalloy K418 were conducted. Microstructure of the welded seam was characterized by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectrometer (EDS). Mechanical properties of the welded seam were evaluated by microhardness. The corresponding mechanisms were discussed in detail. Results show that the laser welded seam have non-equilibrium solidified microstructures consisting of Cr-Ni-Fe-C austenite solid solution dendrites as the dominant and some fine and dispersed Ni-3(Al,Ti) gamma' phase as well as little amount of MC needle carbides and particles enriched in Nb, Ti and Mo distributed in the interdendritic regions, cracks originated from the liquation of the low melting points eutectics in the HAZ grain boundary are observed, the average microhardness of the welded seam and HAZ is higher than that of the base metal due to alloy elements' redistribution of the strengthening phase gamma'. (C) 2008 Elsevier B.V. All rights reserved.
Keyword: Nickel-Based Superalloy ; Needle Carbides ; Cracks ; Aluminum
Language: 英语
Indexed Type: SCI
Corresponding Author: Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
Correspondent Email: gyu@imech.ac.cn
DOI: 10.1016/j.jmatprotec.2007.12.091
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Engineering, Industrial ; Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS Subject Extended: Engineering ; Materials Science
WOS Keyword Plus: ALUMINUM
WOS ID: WOS:000259786200033
ISSN: 0924-0136
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/25886
Appears in Collections:力学所知识产出(1956-2008)_期刊论文

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Recommended Citation:
Pang M,Yu G,Wang HH,et al. Microstructure Study Of Laser Welding Cast Nickel-Based Superalloy K418[J]. Journal of Materials Processing Technology,2008-01-01,207(1-3):271-275.
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