【摘要】 对电站锅炉用P91的母材及焊接接头的蠕变/疲劳交互作用进行试验,使用改进的延性耗损法对试验结果进行分析和处理,得出了P91钢的蠕变/疲劳交互作用特性及交互作用状态下的寿命估算方法。结果表明,P91钢在蠕变/疲劳共同作用下呈负交互作用;在P91的电站锅炉构件寿命估算时,疲劳因素可忽略。更多还原

【Abstract】 Experimental tests were performed on creep-fatigue interaction behavior of P91 base metal and its welding joint for power plant boilers.Based on analysis of the test results and by making use of improved Map-Ductility Exhaustion approach,the interaction behavior of steel P91 and its life estimation method are obtained.Test results show that the creep-fatigue interaction behavior of steel P91 is of the negative type,and the fatigue factor can be neglected in estimating the life of steel P91 in case it is used as power plant boiler components.更多还原