采用高温高压水慢应变速率拉伸测试（SSRT）及断口形貌观察研究了pH值和辐照对国产核反应堆堆内构件用不锈钢的应力腐蚀开裂（SCC）行为的影响。结果表明，不锈钢的SCC敏感性在p H值为7．0溶液中较小，在pH值为6．4与7．5水溶液条件下 SCC敏感性显著增加。带电粒子辐照后出现辐照加速 SCC（IASCC）现象，主要是由于辐照缺陷与局域形变对裂纹起裂的影响导致的，但由于离子辐照损伤深度的限制，不能从 SSRT试样断口形貌观察到离子辐照对 SCC的影响。
The effects of pH value,strain rate and irradiation on the stress corrosion cracking (SCC)in the stainless steel for reactor internals were studied by slow strain rate tension (SSRT)tests in high temperature and high press water environment and the observations of fracture morphology.The results indicated that the SCC susceptibility of stainless steel was tiny at pH=7.0 but remarkably increased at pH=6.4 and 7.5.Due to the effect of irradiation defects and localized deformation on the initiation of crack,the irradiation by charged particles caused the irradiation assisted SCC in stainless steel.But the influence of the ion irradiation on SCC cannot be observed from the SSRT fracture morphology because of the low irradiation penetration depth.
参考文献
| [1] | 杨武.辐照促进应力腐蚀破裂研究的进展[J].材料保护,1994(02):1. |
| [2] | 李红梅;杨武;蔡珣;吕战鹏.304不锈钢在含硼和锂的高温水中的应力腐蚀破裂和断口分析[J].中国腐蚀与防护学报,2004(1):16-19. |
| [3] | 董超芳;关矞心;程学群;刘飞华;李岩;任爱;李晓刚.pH值对高温高压水中304L不锈钢应力腐蚀开裂的影响[J].北京科技大学学报,2010(12):1569-1573. |
| [4] | 徐超亮;王荣山;黄平;刘向兵;任爱.不锈钢中子辐照加速应力腐蚀开裂的带电粒子辐照模拟[J].材料导报,2012(z1):150-153. |
| [5] | J. M. Cookson;G. S. Was;P. L. Andresen.Oxide-induced initiation of stress corrosion cracking in irradiated stainless steel[J].Corrosion: The Journal of Science and Engineering,19984(4):299-312. |
| [6] | Wang, Rong-shan;Xu, Chao-liang;Liu, Xiang-bing;Huang, Ping;Chen, Yu.The studies of irradiation assisted stress corrosion cracking on reactor internals stainless steel under Xe irradiation[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2015:130-134. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%