摘要
利用直流电压降方法(DCPD)测量X-750合金在空气中的疲劳开裂速率和高温高压水环境中的应力腐蚀裂纹扩展速率。介绍利用紧凑拉伸(CT)试样测量裂纹扩展速率的方法。基于滑移-氧化膜破裂-氧化模型,分析裂纹尖端特殊水化学环境形成的原理和过程,探讨水中溶解氧和SO42-离子在该环境形成过程中所起的作用。
This paper studies the fatigue cracking in air and stress corrosion cracking （SCC） in high temperature and high pressure water of alloy X-750 respectively based on direct current potential drop （DCPD） method. The testing method using compact tensile specimens is briefly described, and the mechanism and process that control the crack tip chemistry are discussed according to the slip-film rupture-oxidation model. The effects of dissolved oxygen and SO42- impurities on crack tip chemistry are also discussed.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2014年第4期163-167,共5页
Nuclear Power Engineering
基金
国家大型先进压水堆重大专项(2011ZX0600400908)
