Role of Grain Boundary in Stress Corrosion Cracking based upon Elastic-Plastic Fracture Machanics

基于弹塑性断裂力学的晶界在应力腐蚀开裂中的作用

• 批准号: 23560078
• 负责人: LU Zhanpeng
• 金额: $ 3.49万
• 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: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560078/
• 关键词: 弾塑性; 応力腐食割れ; 環境強度; 結晶粒界; 高温水; き裂進展

Stress corrosion cracking growth rates of Alloy 182 weld metals in T-S and T-L orientations in 288oC pure water with various dissolved oxygen and hydrogen concentrations were measured. High angle random boundaries are dominant in Alloy 182. Extensive inter-dendritic stress corrosion cracking paths on the side surfaces and fracture surfaces of both T-S and T-L orientation specimens. Crack growth rates of the T-S specimen are significantly higher than those of the T-L specimen. The crack growth path in the T-S orientation specimen is apparently perpendicular to the applied loading direction, which appears to be parallel to the loading direction in the T-L specimen. The crack growth rate decreased significantly with decreasing dissolved oxygen concentration.

测定了182合金焊缝金属在288oC、不同溶解氧和氢浓度的纯水中T-S和T-L取向的应力腐蚀裂纹扩展速率。高角度随机边界在182合金中占主导地位。在T-S取向和T-L取向试样的侧面和断口上存在广泛的枝晶间应力腐蚀裂纹路径。T-S试样的裂纹扩展速率明显高于T-L试样。T-S取向试样的裂纹扩展路径与加载方向明显垂直，而T-L取向试样的裂纹扩展路径与加载方向基本平行。随着溶解氧浓度的降低，裂纹扩展速率显著降低。

项目成果

Characterization of microstructure, local deformation and microchemistry in Alloy 600 heat-affected zone and stress corrosion cracking in high temperature water

• DOI: 10.1016/j.corsci.2012.01.029
• 发表时间: 2012-05
• 期刊: Corrosion Science
• 影响因子: 8.3
• 作者: Zhanpeng Lu;T. Shoji;S. Yamazaki;K. Ogawa

Synergistic effects of local strain-hardening and dissolved oxygen on stress corrosion cracking of 316NG weld heat-affected zones in simulated BWR environments

• DOI: 10.1016/j.jnucmat.2011.12.030
• 发表时间: 2012-04
• 期刊: Journal of Nuclear Materials
• 影响因子: 3.1
• 作者: Zhanpeng Lu;T. Shoji;H. Xue;F. Meng;C. Fu;Y. Takeda;K. Negishi

Effects of Prior-deformation and Water Chemistry on Stress Corrosion Cracking of Austenitic Alloys In High Temperature Water

预变形和水化学对高温水中奥氏体合金应力腐蚀开裂的影响

• 发表时间: 2013
• 作者: Zhanpeng Lu;Tetsuo Shoji;Shuang Xia;Meiyi Yao;Bangxin Zhou
• 通讯作者: Bangxin Zhou

Deformation Mode and Microstructure on Stress Corrosion Cracking Path and Kinetics in High Temperature Water Environments

高温水环境下应力腐蚀裂纹路径和动力学的变形模式和微观结构

• 发表时间: 2011
• 作者: Zhanpeng Lu;Tetsuo Shoji;Seiya Yamazaki;Fanjiang Meng;Tichun Dan;Yoichi Takeda;Koji Negishi
• 通讯作者: Koji Negishi

Mechanistic Formulation of PWSCC Growth Rates of Ni-Base Alloys and Weld Metals

镍基合金和焊缝金属 PWSCC 生长速率的机理公式

• 发表时间: 2011
• 作者: Zhanpeng Lu;Tetsuo Shoji;He Xue and Chaoyang Fu
• 通讯作者: He Xue and Chaoyang Fu