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首页> 外文会议>International Corrosion Congress >Stress Corrosion Cracking of Sensitized Type 316 Austenitic Stainless Steel in Hydrochloric Acid Solution - Effect of Sensitizing Time and Prediction of Time to Failure
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Stress Corrosion Cracking of Sensitized Type 316 Austenitic Stainless Steel in Hydrochloric Acid Solution - Effect of Sensitizing Time and Prediction of Time to Failure

机译：富硒溶液溶解型316奥氏体不锈钢应力腐蚀开裂 - 敏化时间和预测失效的效果

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摘要

The stress corrosion cracking (SCC) of a commercial austenitic stainless steel type 316 was investigated as a function of sensitizing time (3.6 ks to 1.08 Ms at a sensitizing temperature of 923 K) and test temperature (333 K to 373 K) in 0.82 kmol/m~3 HCl solution by using a constant load method. From the applied stress dependence of the three parameters (l_(ss), steady state elongation rate, t_(ss), transition time, t_f, time to failure), the relationships between applied stress and the three parameters were divided into three regions that are dominated by either stress, SCC or corrosion. In the SCC-dominated region, the log l_(ss) was a linear function of the log t_f regardless of applied stress and test temperature for each sensitized specimens, showing that l_(ss) became a useful parameter for prediction of t_f. Furthermore, the results obtained indicated that the degree of sensitization increases with increasing sensitizing time, reaches a maximum at a sensitizing time of around 360 ks and then begins to decrease at 1.08 Ms by Cr healing. On the basis of the results obtained, the effect of sensitizing time on SCC and the IGSCC mechanism were discussed.
机译：在0.82 kmol中，研究了商业奥氏体不锈钢型316的应力腐蚀裂解（3.6ks至1.08ms）的函数（3.6ks至1.08ms），并在0.82 kmol中测试温度（333k至373k） / m〜3 HCl溶液采用恒定载荷法。从三个参数的施加应力依赖性（L_（SS），稳态伸长率，T_（SS），转换时间，T_F，失败时间），所施加的应力与三个参数之间的关系被分成三个区域以压力，scc或腐蚀为主。在SCC主导区域中，日志L_（SS）是LOG T_F的线性函数，无论每个致敏样本的应用应力和测试温度如何，都显示L_（SS）成为预测T_F的有用参数。此外，获得的结果表明，致敏程度随着敏化时间的增加而增加，在大约360ks的敏化时间达到最大值，然后通过Cr愈合开始在1.08ms下降。在得到的结果的基础上，讨论了敏化时间对SCC和IGSCC机制的影响。

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