【作者】 夏爽； 茹祥坤； 刘廷光； 李慧； 吕战鹏； 周邦新；

【Author】 XIA Shuang;RU Xiang-kun;LIU Ting-guang;LI Hui;LV Zhan-peng;ZHOU Bang-xin;Institute of Materials,Shanghai University;Key Laboratory for Microstructures,Shanghai University;

【机构】 上海大学材料研究所； 上海大学微结构重点实验室；

【摘要】 对304不锈钢进行了晶界工程处理,显著提高了低ΣCSL晶界比例。在模拟PWR(压水反应堆)高温高压水环境中,通过慢应变速率拉伸试验研究了晶界网络分布对304不锈钢抗应力腐蚀开裂能力的影响。结果表明,在0.1ppm溶解氧的条件下,通过晶界工程处理的304不锈钢的抗应力腐蚀开裂能力明显优于未经晶界工程处理的样品。更多还原

【Abstract】 Grain boundary engineering(GBE) was applied to enhancing the stress corrosion cracking(SCC) resistance of 304 stainless steel.After the GBE treatment,the grain boundary network(GBN) was featured by highly twinned grain-clusters.The slow strain rate tension tests(SSRTs)were used to compare the SCC resistance between the GBE treated and the Non-GBE treated samples in simulated PWR water.It took longer time for the GBE sample to rupture than the Non-GBE sample.Fracture surface morphology showed that the IGSCC was easier to propagate in the Non-GBE sample.This indicated that the GBN has a strong influence on the SCC resistance in PWR water environment.更多还原