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温度对高温水中316L奥氏体不锈钢应力腐蚀开裂速率的影响
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-09-30
温度是影响核电站材料在高温水冷却剂中应力腐蚀开裂的关键参数之一。测试和分析了温度对不同外加应力水平下不同屈服强度奥氏体不锈钢在高温纯水中应力腐蚀开裂速率的影响。发现在110 ℃~288 ℃温度范围内,冷加工316L不锈钢的应力腐蚀开裂扩展速率为热激活过程。应力腐蚀开裂速率的表观活化能与温度区间、应力强度因子大小和屈服强度有关。分析了试验结果与文献报道的温度影响奥氏体不锈钢应力腐蚀开裂的几种类型和相关联的因素。
温度对高温水中奥氏体不锈钢应力腐蚀开裂速率的影响Effects of Temperature on Stress Corrosion Cracking of Austenitic Stainless Steels in High Temperature Water
温度是影响核电站材料在高温水冷却剂中应力腐蚀开裂的关键参数之一。测试和分析了温度对不同外加应力水平下不同屈服强度奥氏体不锈钢在高温纯水中应力腐蚀开裂速率的影响。发现在110 ℃~288 ℃温度范围内,冷加工316L不锈钢的应力腐蚀开裂扩展速率为热激活过程。应力腐蚀开裂速率的表观活化能与温度区间、应力强度因子大小和屈服强度有关。分析了试验结果与文献报道的温度影响奥氏体不锈钢应力腐蚀开裂的几种类型和相关联的因素。
Temperature is one of the key factors for stress corrosion cracking (SCC) of nuclear power plant materials in high temperature water coolants. This paper analyzed the effects of temperature on SCC growth rates of austenitic stainless steels with different yield strengths at two stress intensity factors in high purity water. It was found that SCC growth rate was thermally activated from 110 to 288 ℃. The apparent thermal activation energy was affected by temperature range itself,stress intensity factor and yield strength. Experimental results and reported types of the temperature effect on SCC of austenitic stainless steels as well as correlated factors were analyzed.