Effect of loading rate on low-cycle fatigue damage of 30Cr1Mo1V rotor steel

摘要：

In the paper,the investigations about the effect of loading rate on low-cycle fatigue damage have been carried out based on experiments.The strain-controlled low-cycle fatigue experiments were performed at temperature 538℃ for 30Cr1Mo1V rotor steel.The stain amplitudes were 0.6％ and 1.0％ respectively,the waveform was tension-compression symmetrical triangular,and the loading rates were 0.1 ％/s,0.3％/s,0.5％/s respectively.The high temperature low-cycle fatigue damage evolution equation based on the continuum damage mechanics was derived,and the parameters in the damage evolution equation were fitted with the experimental data.It is found that the damage exponent α increases linearly with the increasing of loading rate.According to the experiment data and theoretical analyses,when the loading rate is from 10-3/s to 0.2/s,the low-cycle fatigue damage of 30CrIMol V steel decreases with the loading rate increasing under the given strain amplitude at 538℃,exceeding the range,the effect of the loading rate neednt considering.And at the same loading rate,the low-cycle fatigue damage of 30Cr1Mo1 V increases with the strain amplitudes increasing.

关键词： 30Cr1Mo1V High temperature low-cycle fatigue Loading rate Damage Strain controlled

作者: Qingmin Sun Jian Chen Jianjun He Yanjie Ren Hao Fu Min Hu

作者单位: School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China Key Laboratory of Efficient and Clean Energy Utilization,College of Hunan Province,Changsha 410114,China

会议类型: 国际会议

会议名称: 国际断裂力学2009年会

会议地点: 成都

会议语种:英文

页码: 255-260

在线出版日期: 2009-10-16（万方平台首次上网日期，不代表论文的发表时间）