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轻水堆(LWR)环境对压力边界材料疲劳性能的影响,包括疲劳寿命及疲劳裂纹扩展速率对设备核安全是非常重要的。为了预测核材料疲劳寿命,改进核材料设计,对国产材料进行腐蚀环境下的疲劳性能研究以得到模拟环境下的疲劳数据是很有必要的。对国产F316Ti在模拟LWR一回路环境下的低周疲劳性能进行了研究,结果显示,高温水环境是影响奥氏体不锈钢低周疲劳性能的重要因素之一。对于同种材料,高温空气中的低周疲劳
The effects of the LWR environment on the fatigue behavior of pressure-boundary materials, including fatigue life and fatigue crack growth rate, are very important for the nuclear safety of the equipment. In order to predict the fatigue life of nuclear materials and improve the design of nuclear materials, it is necessary to study the fatigue properties of domestic materials under corrosive environment to get the fatigue data under simulated conditions. The low cycle fatigue performance of domestic F316Ti under simulated LWR primary loop was studied. The results show that high temperature water environment is one of the important factors affecting low cycle fatigue performance of austenitic stainless steel. For the same kind of material, low cycle fatigue in high temperature air