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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy
作者: Yu, K; Jiang, ZG; Leng, B; Li, CW; Chen, SJ; Tao, W; Zhou, XT; Li, ZJ
刊名: OPTICS AND LASER TECHNOLOGY
出版日期: 2016
卷号: 81, 期号:-, 页码:18—25
关键词: MO-CR SUPERALLOY ; PRECIPITATION ; CARBIDE ; C-276 ; SIZE ; ZONE
DOI: 10.1016/j.optlastec.2016.01.029
通讯作者: Li, CW ; Li, ZJ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai, Peoples R China.
文章类型: 期刊文献
英文摘要: In this study, the microstructure and mechanical properties of laser welds before and after post-weld heat treatment processes were studied. The results show that the tensile strength of the joints can be increased by 90 MPa by a post-weld heat treatment process at 871 degrees C for 6 h, exceeding the strength of the original state of the base metal. Besides, elongation of the joints are also increased to 43% by the process, whereas the elongation of as-welded joints are only 22%. In addition, the Charpy impact properties of laser welds almost do not change. Second phase precipitates, which were identified as Mo-Si rich M6C-type carbides by transmission electron diffraction and scanning electron microscope, were observed at solidification grain boundaries and solidification subgrain boundaries. These carbides can pin dislocations during the following tensile deformation, hence are responsible for the strengthening of tensile properties of the joints. (C) 2016 Elsevier Ltd. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000373546900004
ISSN号: 0030-3992
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25704
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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Recommended Citation:
Yu, K,Jiang, ZG,Leng, B,et al. Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy[J]. OPTICS AND LASER TECHNOLOGY,2016-01-01,81(-):18—25.
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文件名: Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy.pdf
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