论文部分内容阅读
采用低周疲劳性能测试研究了不同压力对Al-5.0Cu-0.4Mn合金低周疲劳塑性应变能的影响。结果表明,不同压力下挤压铸造Al-5.0Cu-0.4Mn合金的塑性应变能密度均随着循环周次的增加而减小,并且压力越大,合金的塑性应变能密度下降的幅度越大;合金的塑性应变能密度跟循环应变幅的大小相关,同一应变幅下,压力下成形的合金塑性应变能密度更大;压力下塑性应变能密度差别在低寿命区比高寿命区大;压力越大,合金抵抗低周疲劳破坏的能力越好。
The effects of different pressures on the low cycle fatigue plastic strain energy of Al-5.0Cu-0.4Mn alloy were investigated by low cycle fatigue test. The results show that the plastic strain energy density of squeeze cast Al-5.0Cu-0.4Mn alloy decreases with the increase of cycle number under different pressures, and the greater the decrease of plastic strain energy density, ; The plastic strain energy density of the alloy is related to the magnitude of the cyclic strain amplitude, and the plastic strain energy density of the alloy formed under the same strain amplitude and pressure is greater; the difference of the plastic strain energy density under pressure is greater than that in the high-service life area under the pressure; The greater the ability of the alloy to resist low cycle fatigue damage, the better.