Effect of loading mode on fracture behavior of CrNiMoV steel welded joint in simulated environment of low pressure nuclear steam turbine
Effect of loading mode on fracture behavior of CrNiMoV steel welded joint in simulated environment of low pressure nuclear steam turbine
复制标题
低压核汽轮机模拟环境加载方式对CrNiMoV钢焊接接头断裂行为的影响
DOI：
10.1016/j.engfracmech.2018.11.023
复制
发表时间：
2019-01-01
影响因子：
5.4
通讯作者：
Xuan, Fu-zhen
中科院分区：
文献类型：
--
作者：
Huang, Yuhui;Ouyang, Yuqing;Xuan, Fu-zhen
通过恒加载试验（CLT）和慢应变速率试验（SSRT），研究了30Cr2Ni4MoV焊接接头在低压核汽轮机模拟环境下的应力腐蚀开裂（SCC）行为。CLT的焊接接头断裂主要发生在熔合线附近，主要是应力与电偶效应的相互作用，而SSRT的焊接接头断裂主要发生在强度最弱的焊接金属上。在两种不同加载模式下，电蚀与焊接接头强度的不匹配决定了焊接接头的断裂位置和SCC敏感性。
Stress corrosion cracking (SCC) behaviors of 30Cr2Ni4MoV welded joint in simulated environment of low pressure nuclear steam turbine were addressed with different fracture positions in the welded joint by constant loading test (CLT) and slow strain rate test (SSRT). The fracture of the welded joint happened near the fusion line which was ascribed to the interaction between stress and galvanic effect for CLT, while in welded metal with the weakest strength for SSRT. The mismatch between galvanic corrosion and strength of welded joint determined the fracture location and SCC sensitivity of the welded joint when the two different loading modes were applied.