High cycle fatigue behavior of a dissimilar metal welded joint in ultra-supercritical steam turbine rotor
High cycle fatigue behavior of a dissimilar metal welded joint in ultra-supercritical steam turbine rotor
复制标题
超超临界汽轮机转子异种金属焊接接头高周疲劳行为
DOI：
10.1088/2053-1591/ab66aa
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发表时间：
2020-01
影响因子：
2.3
通讯作者：
Zhang Jian-Xun
中科院分区：
文献类型：
--
作者：
Wang Wen-Ke;Xu Zhen-Zhen;Zhu Bo;Zhang Xiao-Fan;Zhong Jie;Zhang Jian-Xun
本文系统地研究了超超临界汽轮机转子异种金属焊接接头（DMWJ）的高周疲劳（HCF）性能和微观结构。该异种金属焊接接头是采用窄间隙埋弧焊制造的（
The high cycle fatigue (HCF) property and microstructure of a dissimilar metal welded joint (DMWJ) for ultra-supercritical steam turbine rotor were systematically investigated in this paper. The DMWJ was fabricated using narrow gap submerged arc welding (NG-SAW) technique with buttering layer. Conditional fatigue strength of 30Cr1Mo1V (BM-1), buttering layer (BL), weld metal (WM) and 30Cr2Ni4MoV (BM-2) based on S-N curve was obtained by HCF tests at room temperature. The microstructure and second-phase carbide as well as fracture appearance of BM-1, BL, WM and BM-2 were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscope (TEM). The results show that the BL has lower fatigue strength, which are related to more content of the soft ferrite and less content of the hard carbide. The acicular ferrite represents better fatigue properties than massive ferrite due to barrier effect. Additionally, dislocation density sharply increases near the carbides, grain boundaries, and lath structures resulting in dislocation tangle after HCF test, which helps to improve the fatigue strength of the welded joint. The carbide precipitated, aggregated, and grown in the grain boundaries promoted crack nucleation, reduced the crack propagation rate and affected the crack propagation path.
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失效%20机构%20和%20设计%20of%20异种%20焊缝%20of%209%Cr%20和%20CrMoV%20钢%20up%20to%20very%20high%20cycle%20疲劳%20制度
影响因子：
6
作者：
Wei-Chang Zhang;Ming-Liang Zhu;Kai Wang;Fu-Zhen Xuan
通讯作者：
Fu-Zhen Xuan
DOI：
10.1016/j.ijpvp.2017.06.003
发表时间：
2017-07-01
影响因子：
3
作者：
Javadi, Y.;Walsh, J. N.;Francis, J. A.
通讯作者：
Francis, J. A.
DOI：
10.1016/j.msea.2018.12.087
发表时间：
2019-02-04
影响因子：
6.4
作者：
Cortes, R.;Rodriguez, N. K.;Jaramillo, D.
通讯作者：
Jaramillo, D.
影响因子：
6.3
作者：
C. Das;A. K. Bhaduri;G. Srinivasan;V. Shankar;S. Mathew
通讯作者：
C. Das;A. K. Bhaduri;G. Srinivasan;V. Shankar;S. Mathew
DOI：
10.1016/b978-0-08-100552-1.00009-9
发表时间：
2017
期刊：
--
影响因子：
--
作者：
S. Sorrentino
通讯作者：
S. Sorrentino