摘要
在360℃,550和650℃下,对涡轮盘用GH169镍基高温合金的低周疲劳(LCF)特性进行了研究。结果表明,GH169具有较好的低周疲劳特性,在实验范围内,具有马辛效应,其应力—应变曲线呈软化趋势。低周被劳寿命可由塑性应变能表达。其低周疲劳性能随温度升高而变差。
The behavior of low-cycle fatigue (LCF) of Ni-base superalloy GH169 used for turbine disc were studied at 360℃, 550℃ and 650℃. It was found that the alloy have better LCF properties and Massing description.Cyclic stress-strain curve softening was observed during the testing. LCF life could be well expressed by plastic strain energy. However, LCF properties of the alloy became worse at an elvatcd temperature.
出处
《石油大学学报（自然科学版）》
CSCD
1990年第6期68-73,共6页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
合金
低周疲劳
疲劳寿命
GH169
Alloy
Low cycle fatigue- Fatigue life- Plastic strain
Stress-strain properties
