【摘要】 试验了GH76 1涡轮盘在 6 5 0℃疲劳 /蠕变交互作用下的裂纹扩展速率 ,试验结果表明 :GH76 1合金在 6 5 0℃初始应力强度ΔK(K) =30MN/m3 / 2 ,保载 90s时 ,裂纹扩展率较快 ,曲线斜率变化不明显更多还原

【Abstract】 The crack growth rate of superalloy GH761 disk for turbine at 650℃ fatigue and creep interaction was tested. The test results show that with initial stress strength ΔK(K)=30 MN/m 3/2 and holding load for 90 seconds at 650 ℃, the crack growth rate of superalloy GH761 was fast, a nd the slope change of growth rate was not appreciable.更多还原