Investigation of local brittle zone in multipass welded joint of NiCrMoV steel with heavy section
Investigation of local brittle zone in multipass welded joint of NiCrMoV steel with heavy section
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大截面NiCrMoV钢多道焊接接头局部脆性区研究
DOI：
10.1557/jmr.2017.467
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发表时间：
2018-04
影响因子：
2.7
通讯作者：
Wang Peng
中科院分区：
文献类型：
--
作者：
Li Yifei;Cai Zhipeng;Li Kejian;Pan Jiluan;Liu Xia;Sun Lingen;Wang Peng
焊接技术已成功地应用于核电站低压汽轮机转子的制造。通过横区断裂韧性试验，研究了大截面NiCrMoV钢焊接接头的局部脆性区，分析了不同第二峰值温度下焊缝模拟再加热区的马氏体-奥氏体组分对韧性的影响。结果表明，裂纹在焊缝二次加热区以不稳定方式扩展，马氏体-奥氏体相促进了裂纹的萌生和扩展。马氏体-奥氏体组分的精细组织包括残余奥氏体相、马氏体相和马氏体相-奥氏体相的混合组织。在模拟焊缝再加热区的不完全相变区，冲击韧性急剧恶化，这与混合组织的形成有关，在奥氏体晶界和晶内形成了大的块状马氏体-奥氏体组分，呈网状分布。
Welding was successfully used in the fabrication of low pressure steam turbine rotors for nuclear power plants. In this paper, the local brittle zone of the welded joint in NiCrMoV steel with heavy section was investigated by cross-zone fracture toughness test and the effect of martensite–austenite constituent in the simulated reheated zone of welds with different second peak temperature on toughness was analyzed. The results showed that the crack propagated in unstable manner in the reheated zone of welds where the martensite–austenite constituent promoted the initiation and propagation of the crack. The fine structure of martensite–austenite constituent contained retained austenite, martensite, and martensite–austenite mixture microstructure. The impact toughness deteriorated drastically in the incomplete phase transition zone for the simulated reheated zone of welds related to the formation of mixture microstructure in which large blocky martensite–austenite constituent at prior austenite grain boundaries and inside the grains were distributed in the shape of network.
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DOI：
10.1146/annurev.ms.03.080173.001551
发表时间：
1973-08
期刊：
Annual Review of Materials Science
影响因子：
--
作者：
G. Meyrick;G. W. Powell
通讯作者：
G. Meyrick;G. W. Powell
影响因子：
6.2
作者：
Liu Peng;F. Lu;Xia Liu;Hui-jun Ji;Yulai Gao
通讯作者：
Liu Peng;F. Lu;Xia Liu;Hui-jun Ji;Yulai Gao
影响因子：
6.3
作者：
Yaowu Shi;Z. Han
通讯作者：
Yaowu Shi;Z. Han
DOI：
10.1007/s11663-013-0008-5
发表时间：
2014-02
期刊：
Metallurgical and Materials Transactions B
影响因子：
--
作者：
Zhi-xiong Zhu;L. Kuzmikova;Huijun Li;F. Barbaro
通讯作者：
Zhi-xiong Zhu;L. Kuzmikova;Huijun Li;F. Barbaro
DOI：
10.1016/s1006-706x(08)60085-0
发表时间：
2007-09
影响因子：
2.5
作者：
W. W. Xu-W.;Qingfeng Wang;T. Pan;H. Su;Caifu Yang
通讯作者：
W. W. Xu-W.;Qingfeng Wang;T. Pan;H. Su;Caifu Yang