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| Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser | |
Liu XB(刘秀波) ; Yu G(虞钢); Pang M(庞铭); Fan JW; Wang HH(王恒海); Zheng CY(郑彩云); Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
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| Source Publication | Applied Surface Science
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| 2007 | |
| Volume | 253Issue:17Pages:7281-7289 |
| ISSN | 0169-4332 |
| Abstract | Experiments of autogenous laser full penetration welding between dissimilar cast Ni-based superalloy K418 and alloy steel 42CrMo flat plates with 3.5 mm thickness were conducted using a 3 kW continuous wave (CW) Nd:YAG laser. The influences of laser welding velocity, flow rate of side-blow shielding gas, defocusing distance were investigated. Microstructure of the welded seam was characterized by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). Mechanical properties of the welded seam were evaluated by microhardness and tensile strength testing. Results show that high quality full penetration laser-welded joint can be obtained by optimizing the welding velocity, flow rate of shielding gas and defocusing distance. The laser-welded seam have non-equilibrium solidified microstructures consisting of gamma-FeCr0.29Ni0.16C0.06 austenite solid solution dendrites as the dominant and very small amount of super-fine dispersed Ni3Al gamma' phase and Laves particles as well as MC needle-like carbides distributed in the interdendritic regions. Although the microhardness of the laser-welded seam was lower than that of the base metal, the strength of the joint was equal to that of the base metal and the fracture mechanism showed fine ductility. (c) 2007 Elsevier B.V. All rights reserved. |
| Keyword | Laser Processing Metals And Alloys Full Penetration Welding Microstructure Mechanical Properties Tensile Properties Aluminum-alloys Joints |
| DOI | 10.1016/j.apsusc.2007.03.009 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000247867700050 |
| WOS Keyword | TENSILE PROPERTIES ; ALUMINUM-ALLOYS ; JOINTS |
| WOS Research Area | Chemistry ; Materials Science ; Physics |
| WOS Subject | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/33945 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Liu XB,Yu G,Pang M,et al. Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser[J]. Applied Surface Science,2007,253,17,:7281-7289. |
| APA | 刘秀波.,虞钢.,庞铭.,Fan JW.,王恒海.,...&Yu, G .(2007).Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser.Applied Surface Science,253(17),7281-7289. |
| MLA | 刘秀波,et al."Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser".Applied Surface Science 253.17(2007):7281-7289. |
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