Haynes 230镍基超合金高温低周疲劳寿命预测  

Prediction of High Temperature Low Cycle Fatigue Life of Haynes 230 Nickel-Base Superalloy

作　　者：王伟 吕春堂 刘兵 金丹 WANG Wei;LYU Chun - tang;LIU Bing;JIN Dan(School of Energy and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China)

机构地区：[1]沈阳化工大学能源与动力工程学院,辽宁沈阳110142

出　　处：《压力容器》2018年第5期22-27,共6页Pressure Vessel Technology

基　　金：国家自然科学基金项目(11102119);辽宁省自然科学基金项目(201602586)

摘　　要：针对Haynes 230镍基超合金进行总应变控制的高温低周疲劳试验。结果表明,在816℃和927℃时,材料在较高应变范围内表现出循环硬化/软化行为,在较低的应变范围内表现出循环硬化/饱和行为。一般来说,疲劳寿命随着温度的提高而降低。然而,在总应变范围高于1.0%时,由于在半寿命时927℃比816℃有较小的塑性应变幅,从而导致了疲劳寿命在927℃时比在816℃时更长。选用Manson-Coffin方程和能量法进行了疲劳寿命预测,并采用方差和分散带因子两个参量对两种模型的预测能力进行比较,结果表明Manson-Coffin方程的预测效果较好。A series of low cycle fatigue tests at high temperature were carried out for Haynes 230 nickelbase superalloy under the total strain control. The results show that at 816 ℃ and 927 ℃,the material exhibits cyclic hardening/softening behavior in the range of higher total strain and exhibits cyclic hardening/saturation behavior in the range of lower total strain. Generally,the fatigue life decreases with increasing temperature. However,when the total strain range is higher than 1. 0%,the fatigue life at 927 ℃ is longer than that at 816 ℃ due to the presence of smaller plastic strain amplitude at 927 ℃ than 816 ℃ at half life. The fatigue life prediction was performed using the Manson-Coffin equation and the energy method. The prediction capabilities of the two models were compared using the variance and dispersion band factor. The results show that the Manson-Coffin equation has better prediction effect.

关 键 词：Haynes 230镍基超合金 高温低周疲劳 循环硬化 疲劳寿命预测 

分 类 号：TH142.2[一般工业技术—材料科学与工程] TG113.25[机械工程—机械制造及自动化]