摘要本文考察了镍基高温合金（γ＋γ）单晶压缩屈服行为的温度、取向和应变速率依赖性、结果表明，γ＋γ合金临界分解切应力（ＣＲＳＳ）的温度依赖性主要由γ’相的ＡＰＢ能和γ’相的ＣＲＳＳ的温度依赖性共同决定，而取向依赖性和应变速率敏感性则由γ相决定．γ＋γ’合金与γ’单相ＣＲＳＳ的温度依赖性和应变速率敏感性是由根本不同的过程控制 Abstract The dependence of the temperature, orientation and strain rate on the yield behavior of (γ + γ) single crystal in nickel-base superalloy was investigated. The results show that the temperature dependence of critical fracture stress (CRSS) And γ ’phase of the CRSS temperature dependence of common determination, and orientation-dependent and strain rate sensitivity is determined by the γ phase. The temperature-dependent and strain rate-sensitivity of γ + γ ’alloys to γ’ single-phase CRSS is governed by fundamentally different processes