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晶界网络分布对304不锈钢在模拟PWR水环境中的抗应力腐蚀开裂性能的影响
Effect of the grain boundary network on the SCC resistance of 304 stainless steel in a simulated PWR water
【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。
【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.
【Key words】 304 stainless steel; stress corrosion cracking; grain boundary engineering; PWR;
- 【会议录名称】 中国核科学技术进展报告(第三卷)——中国核学会2013年学术年会论文集第4册(核材料分卷、同位素分离分卷、核化学与放射化学分卷)
- 【会议名称】中国核学会2013年学术年会
- 【会议时间】2013-09-11
- 【会议地点】中国黑龙江哈尔滨
- 【分类号】TL341
- 【主办单位】中国核学会