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题名: Comparative study on fiber laser welding of GH3535 superalloy in continuous and pulsed waves
作者: Jiang, ZG; Tao, W; Yu, K; Tan, CW; Chen, YB; Li, LQ; Li, ZJ
刊名: MATERIALS & DESIGN
出版日期: 2016
卷号: 110, 页码:728-739
关键词: Laser welding ; GH3535 superalloy ; Pulsed wave ; Microstructure ; Mechanical properties
DOI: 10.1016/j.matdes.2016.08.055
通讯作者: Tao, W ; Tan, CW (reprint author), Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China.
文章类型: 期刊论文
英文摘要: GH3535 superalloy is the candidate structural material for the next-generation nuclear reactors and its related welding problem is inevitable and needs to be solved. In this work, fiber laser welding of 4-mm-thick GH3535 superalloy in continuous wave (CW) and pulsed wave (PW) was comparatively investigated. The weld appearances, dynamic behavior of weld pool, microstructure and mechanical properties in both cases were studied. The results indicated that larger porosities were present in the bottom of the CW joint while few porosities appeared in the PW joint. The laser weld zone of both CW and PW joints was still composed of gamma-Ni matrix and M6C carbides. Grain size of PW joint was smaller than that of CW joint. More precipitated particles were found in the PW joint. The presence of porosity in the CW joint reduced mechanical properties greatly. The tensile strength decreased to 85% of that of base metal at room temperature, and 82.3% at high temperature while the PW joint strength could reach 97.6% and 95.7% at room and high temperature, respectively. The fracture surface of CW joint had a flat pattern and porosities, while PW joint exhibited dimples on the fracture surface both at room and high temperature. (C) 2016 Published by Elsevier Ltd.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000385600800078
ISSN号: 0264-1275
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26453
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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