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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
Source PublicationOPTICS AND LASER TECHNOLOGY
ISSN0030-3992
Volume81Issue:-Pages:18—25
Subtype期刊文献
AbstractIn 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.
KeywordMo-cr Superalloy Precipitation Carbide C-276 Size Zone
DOI10.1016/j.optlastec.2016.01.029
Indexed BySCI
Language英语
WOS IDWOS:000373546900004
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25704
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorLi, CW; Li, ZJ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai, Peoples R China.
Recommended Citation
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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