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溫度對高溫水中316L奧氏體不銹鋼應(yīng)力腐蝕開裂速率的影響
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更新時間：2015-09-30
溫度是影響核電站材料在高溫水冷卻劑中應(yīng)力腐蝕開裂的關(guān)鍵參數(shù)之一。測試和分析了溫度對不同外加應(yīng)力水平下不同屈服強度奧氏體不銹鋼在高溫純水中應(yīng)力腐蝕開裂速率的影響。發(fā)現(xiàn)在110 ℃~288 ℃溫度范圍內(nèi),冷加工316L不銹鋼的應(yīng)力腐蝕開裂擴展速率為熱激活過程。應(yīng)力腐蝕開裂速率的表觀活化能與溫度區(qū)間、應(yīng)力強度因子大小和屈服強度有關(guān)。分析了試驗結(jié)果與文獻報道的溫度影響奧氏體不銹鋼應(yīng)力腐蝕開裂的幾種類型和相關(guān)聯(lián)的因素。
溫度對高溫水中奧氏體不銹鋼應(yīng)力腐蝕開裂速率的影響Effects of Temperature on Stress Corrosion Cracking of Austenitic Stainless Steels in High Temperature Water
溫度是影響核電站材料在高溫水冷卻劑中應(yīng)力腐蝕開裂的關(guān)鍵參數(shù)之一。測試和分析了溫度對不同外加應(yīng)力水平下不同屈服強度奧氏體不銹鋼在高溫純水中應(yīng)力腐蝕開裂速率的影響。發(fā)現(xiàn)在110 ℃~288 ℃溫度范圍內(nèi),冷加工316L不銹鋼的應(yīng)力腐蝕開裂擴展速率為熱激活過程。應(yīng)力腐蝕開裂速率的表觀活化能與溫度區(qū)間、應(yīng)力強度因子大小和屈服強度有關(guān)。分析了試驗結(jié)果與文獻報道的溫度影響奧氏體不銹鋼應(yīng)力腐蝕開裂的幾種類型和相關(guān)聯(lián)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.