Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water
Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water
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DOI：
10.1016/j.corsci.2012.01.029
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发表时间：
2012-05
影响因子：
8.3
通讯作者：
Zhanpeng Lu;T. Shoji;S. Yamazaki;K. Ogawa
中科院分区：
文献类型：
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作者：
Zhanpeng Lu;T. Shoji;S. Yamazaki;K. Ogawa
随着合金 600 热影响区中距焊缝熔合线距离的增加，核平均取向差减小，Σ3 边界分数增加。 Cr7C3碳化物主要在随机大角度晶界析出。观察到铬贫化以及硼和磷在晶界处的偏析。在模拟压水堆水环境中，合金 600 热影响区样品表现出比母材更高的晶间应力腐蚀裂纹生长速率。应变硬化和升高温度可提高裂纹扩展速率。分析了应力对界面氧化动力学的作用。
With increasing the distance from the weld fusion line in an Alloy 600 heat-affected zone, kernel average misorientation decreases and the fraction of Σ3 boundaries increases. Cr7C3carbides mainly precipitate at random high angle boundaries. Chromium depletion and segregation of boron and phosphorous at grain boundaries are observed. Alloy 600 heat-affected zone specimens exhibit higher intergranular stress corrosion cracking growth rates than that in the base metal in simulated pressurized water reactor water environments. Crack growth rate is enhanced by strain hardening and by increasing temperature. The role of stress on interface oxidation kinetics is analyzed.