Influence of dwell time on low cycle fatigue behavior of directionally solidified superalloy DZ125 at elevated temperature
Low cycle fatigue (LCF) tests of directionally solidified superalloy DZ125 were conducted with different dwell time at 850℃. The tensile dwell time of experiment was 1s, 60s, 120s and 240s. Contrastive analysis of different dwell time was carried out including stress-strain hysteresis loop, strain history and fatigue life. The results indicated that dwell time had significant effect to low cycle fatigue behavior, but the effect was not obvious when dwell time exceed a value. Finally, combined with SEM observation of fracture surface, the influence of fatigue damage and creep damage was analyzed. The results indicated that creep damage played more important role as dwell time increase.
DZ125 dwell time fatigue creep
Liu Jinlong Yang Xiaoguang Shi Duoqi Qi Hongyu Wang Jingke
School of Jet Propulsion Beihang University Beijing China
国际会议
The 3rd International Symposium on Jet Propulsion and Power Engineering(第三届喷气推进与动力工程国际会议 ISJPPE)
南京
英文
497-502
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）