Effect of Heat Treatment on Corrosion, Fatigue, and Corrosion Fatigue Behavior of 17-4PH Stainless Steel
Effect of Heat Treatment on Corrosion, Fatigue, and Corrosion Fatigue Behavior of 17-4PH Stainless Steel
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DOI：
10.1007/s11665-022-07614-6
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发表时间：
2022-11-17
影响因子：
2.3
通讯作者：
Berenjkoub, A.
中科院分区：
文献类型：
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作者：
Malakshah, M. Ghasemian;Eslami, A.;Berenjkoub, A.
研究了热处理对17-4PH不锈钢疲劳和腐蚀疲劳抗力的影响，其中1050℃固溶30min和620℃时效240 min为过时效热循环，464℃热处理129 min为优化时效热循环。比较了这些试件的显微组织特征、拉伸性能、硬度性能、腐蚀性能、氢渗透性能、疲劳性能和腐蚀疲劳性能。结果表明，时效后的17-4PH不锈钢具有较好的耐腐蚀性和抗疲劳性能。尽管如此，热处理钢的腐蚀疲劳抗力是外加载荷和它们在腐蚀性环境中暴露时间的函数。事实上，在较低的外加载荷/较长的暴露时间下，腐蚀速率较高、氢损伤敏感性较小的过时效钢比时效17-4PH不锈钢具有更好的腐蚀疲劳性能。
This study investigates effect of heat treatment on fatigue and corrosion fatigue resistance of 17-4PH stainless steel at two thermal cycles, which consisted of 30 min solution annealing at 1050 C and 240 min ageing at 620 C as an overaged thermal cycle, and heat treatment at 464 C for 129 min as an optimized aged thermal cycle. Microstructural characteristics, tensile and hardness properties, corrosion performance, Hydrogen permeation, fatigue and corrosion fatigue resistance of these samples were then compared. Results showed that corrosion resistance and fatigue resistance of aged 17-4PH stainless steel was superior. Despite this, the corrosion fatigue resistance of the heat-treated steels was a function of applied loads and their exposure time to the corrosive environment. In fact, for the lower applied loads/longer exposure times, the overaged steel with higher corrosion rate, and less susceptibility to hydrogen damage had better corrosion fatigue performance, than the aged 17-4PH stainless steel.