The work-hardening characteristic of nickel-based GH4141 superalloy was investigated using uniaxial compression tests with different cold deformations. Prior to compression, the solution treatment was optimized using the dissolving temperature of precipitations, the mean size of grains, and the microhardness of the samples. The typical true strain-stress curve included elastic deformation (ε ≤ 0.03), elastoplastic transition (0.03 ≤ ε ≤ 0.05), and plastic deformation (ε ≥ 0.05) stages. The true strain-stress relationship was formulated on the basis of Tian-Zhang model. During the plastic deformation stage, the true stress gradually increased due to the increase in dislocation slip resistance caused by the formation of dislocation tangles and different boundaries. The hardening rate gradually decreased because of the tardy dynamic recovery, and the decreasing dislocation density increment caused by the formation of grain boundaries.

使用具有不同冷变形的单轴压缩试验研究了镍基GH4141高温合金的加工硬化特性。在压缩之前，使用沉淀的溶解温度，晶粒的平均大小和样品的显微硬度来优化固溶处理。典型的真实应变应力曲线包括弹性变形（ε≤0.03），弹塑性转变（0.03≤ε≤0.05）和塑性变形（ε≥0.05）阶段。真实的应力-应变关系是在天张模型的基础上建立的。在塑性变形阶段，由于位错缠结和不同边界的形成引起的位错滑动阻力的增加，真正的应力逐渐增加。由于迟滞的动态恢复，硬化率逐渐降低，