The effects of prestressing overload on dow cycle fatigue and fatigue crack growth rates da/dN of titanium alloy TC-11 and Ni-base superalloy GH33A for gas turbine disks were investigated at room temperature and 633K.

• 研究了预拉伸应力过载对TC-11钛合金及GH33A高温合金的低周疲劳及da/dN的影响。