Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy
Yu, K; Jiang, ZG; Leng, B; Li, CW; Chen, SJ; Tao, W; Zhou, XT; Li, ZJ; Li, ZJ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai, Peoples R China.
2016
发表期刊OPTICS AND LASER TECHNOLOGY
ISSN0030-3992
卷号81期号:-页码:18—25
文章类型期刊文献
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.
关键词Mo-cr Superalloy Precipitation Carbide C-276 Size Zone
DOI10.1016/j.optlastec.2016.01.029
收录类别SCI
语种英语
WOS记录号WOS:000373546900004
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25704
专题中科院上海应用物理研究所2011-2018年
通讯作者Li, CW; Li, ZJ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai, Peoples R China.
推荐引用方式
GB/T 7714
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,2016,81(-):18—25.
APA Yu, K.,Jiang, ZG.,Leng, B.,Li, CW.,Chen, SJ.,...&Li, ZJ .(2016).Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy.OPTICS AND LASER TECHNOLOGY,81(-),18—25.
MLA Yu, K,et al."Effects of post-weld heat treatment on microstructure and mechanical properties of laser welds in GH3535 superalloy".OPTICS AND LASER TECHNOLOGY 81.-(2016):18—25.
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