Clarifying the physicochemical mechanism on the intergranular stress corrosion cracking of non-sensitized materials by nano-mechanical-technology

使用高度调整的测试材料，以下项目进行了研究和评估：1）晶间应力腐蚀起始应力和晶间局部应力，2）晶界附近的堆垛层错能，3）通过原位X射线衍射识别氧化膜，4）长期应力腐蚀开裂表征。在此基础上，从应力、材料和环境的角度阐明了非敏化材料晶间应力腐蚀开裂的物理化学机理。

Using highly adjusted test materials, following items were investigated and evaluated;1) intergranular stress corrosion initiation atress and intergranular local stress, 2) stacking fault energy near grain boundaries, 3) identification of oxide film by in-situ X-ray diffraction, 4) long-term stress corrosion cracking characterization. Based onthese analyses, the physicochemical mechanism on the intergranular stress corrosion cracking of non-sensitized materials was clarified, from the view points of stress, materials and environment.