Mechanical-Electrochemical Interaction Mechanism for the Effect of Elastic-Plastic Anisotropy on Stress Corrosion Cracking in High Temperature Water

弹塑性各向异性对高温水中应力腐蚀开裂影响的机械-电化学相互作用机制

• 批准号: 20560063
• 负责人: LU Zhanpeng
• 金额: $ 3万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560063/
• 关键词: 環境強度; 応力腐食割れ; 弾塑性異方性; 高温水; 電気化学; 構造材料; 軽水炉

Stress corrosion cracking (SCC)of austenitic alloys in simulated boiling water reactor (BWR)environments and pressurized water reactor (PWR)environments are measured. The effects of mechanical anisotropy and environmental parameters were investigated by experimental and theoretical methods. In a simulated PWR primary water, a significantly higher growth rate was observed in a 1-D rolled 316L stainless steel (SS)than those in a 3-D rolled 316L SS. SCC growth rates of 304NG SS after 1-D rolling are higher in the T-L orientation than those in the L-T orientation in both oxygenated and hydrogenated water at 288 oC. The mild inhibiting effect of decreasing electrode potential on crack growth of cold-rolled SSs is analyzed. Microstructure and local misorientation in 316NG SS weld heat-affected zones were measured and correlated to SCC in high temperature water.

对模拟沸水堆（BWR）和压水堆（PWR）环境下奥氏体合金的应力腐蚀开裂（SCC）进行了测试。通过实验和理论方法研究了力学各向异性和环境参数的影响。在模拟压水堆原水中，一维轧制316L不锈钢（SS）的SCC生长速率明显高于三维轧制316L不锈钢（SS）。在288℃的充氧和氢化水中，一维轧制后的304NG SS在T-L取向下的SCC生长速率均高于L-T取向。分析了电极电位降低对冷轧不锈钢裂纹扩展的温和抑制作用。对316NG SS焊缝热影响区的显微组织和局部取向偏差进行了测量，并将其与高温水中的SCC进行了对比。

项目成果

Effects of Electrochemical Parameters on SCC of Stainless Steels in Simulated BWR environments.

模拟沸水堆环境中电化学参数对不锈钢 SCC 的影响。

• 发表时间: 2010
• 作者: Z. P. Lu ;T. Shoji;K. Sakaguchi;F. J. Meng;Y. B. Qiu
• 通讯作者: Y. B. Qiu

Effects of hydrogen on the anodic behavior of Alloy 690 at 60℃

氢对690合金60℃阳极行为的影响

• 发表时间: 2010
• 期刊: Corrosion Science 52
• 作者: Tichun Dan;Tetsuo Shoji;Zhanpeng Lu;Kazuhiko Sakaguchi;Jianqiu Wang;En-Hoi Han;Wei Ke
• 通讯作者: Wei Ke

Stress corrosion cracking growth behavior of strain hardened 316L SS and weld transition zone in high temperature water

高温水中应变硬化316L SS及焊缝过渡区应力腐蚀裂纹扩展行为

• 发表时间: 2009
• 作者: M.Kotsugi;M.Oshima;et al.;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu

Crack Branching and Its Effect on Environmentally Assisted Cracking in High Temperature Water Environments

高温水环境下裂纹分支及其对环境辅助开裂的影响

• 发表时间: 2010
• 作者: Z. P. Lu;H. Xue;T. Shoji.;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu

Effects of Electrochemical Parameters on SCC of Stainless Steels in Simulated BWR Environments

模拟沸水堆环境中电化学参数对不锈钢 SCC 的影响

• 发表时间: 2010
• 作者: F. Narita;Y. Shindo;K. Sato and T. Takeda;Zhanpeng Lu
• 通讯作者: Zhanpeng Lu