Effect of Elastic Modulus on Parameter of Low Cycle Fatigue Performance

Low cycle fatigue tests and static tension tests were performed for steel 1Cr11Ni2W2MoV,with air temperature of 500℃.The difference between static elastic modulus and dynamic elastic modulus was investigated.The effects of elastic modulus on parameter of low cycle fatigue were studied also.When fatigue life is longer than 5 000 cycles,the results of fatigue life prediction showed that elastic modulus affected the precision of fatigue life prediction to a great extent,and there was large difference in scatter band.It is necessary to use elastic modulus measured in fatigue machine to predict low cycle fatigue life.