Shear-compression deformation (SCD) is more proper than uniaxial compression to simulate the actual thermoforming with non-single strain modes. The flow behavior and thermoforming properties of GH4169 superalloy were studied by SCD at 1000–1200 ℃, 0.01–1 s⁻¹. The flow curves showed significant fluctuation characteristics caused by the alternating dislocation proliferation and the dislocation annihilation. The slot region of shear-compression specimens (SCS) was most deformed, thus stress and strain drastically concentrated. The thermal activation energy of SCD was determined to be 556.5 KJ/mol, which was higher than that under uniaxial compression (411.0 KJ/mol). It’s indicated that the existence of shear strain increased the difficulty of thermoforming. Besides, the stress accumulation near the niobium-rich carbon-borides caused the severe instability cracking at 1200 ℃. In addition, virtually no change in size of the second phases during SCD except for 1100 ℃− 0.01 s⁻¹. The fraction of deformation textures along the {110}, {111}, and {001} orientations decreased successively, indicating {110} was the prior orientation for grain rotating in SCD. Moreover, based on the processing map, the optimal SCD window was determined as 1135–1150 ℃ and 0.1–0.32 s⁻¹ to guide the actual thermoforming of GH4169 superalloy.

剪切压缩变形 (SCD) 比单轴压缩更适合模拟具有非单应变模式的实际热成型。GH4169高温合金在1000~1200 ℃、0.01~1 s ^{-1下的流动行为和热成型性能研究}. 流动曲线呈现出由位错增殖和位错湮灭交替引起的显着波动特征。剪切压缩试样（SCS）的槽区变形最大，因此应力和应变急剧集中。SCD的热活化能为556.5 KJ/mol，高于单轴压缩（411.0 KJ/mol）。表明剪切应变的存在增加了热成型的难度。此外，富铌碳硼化物附近的应力积累导致了1200 ℃的严重失稳开裂。此外，除了 1100 ℃− 0.01 s ^{-1外，SCD 期间第二相的大小几乎没有变化}. 沿{110}、{111}和{001}方向的变形织构比例依次减小，表明{110}是SCD中晶粒旋转的优先方向。此外，根据加工图，确定最佳SCD窗口为1135-1150 ℃和0.1-0.32 s ^-1以指导GH4169高温合金的实际热成型。