The deformation behavior of a Ni-based superalloy, Su-263, was investigated using a blend of compression experiments, microstructural characterization and crystal plasticity finite element modeling. Uniaxial compression tests were performed at different strain rates ($800{\mathrm{s}}^{-1}$ - $2500{\mathrm{s}}^{-1}$) and temperatures (300–1073 K) using Split-Hopkinson pressure bar. The microstructure was examined using scanning electron microscopy and electron back-scatter diffraction technique was employed to provide necessary inputs required for crystal plasticity modeling. The simulations used a phenomenological crystal plasticity model based on thermally activated theory of plastic flow. The model was found capable of reproducing the stress-strain curves and texture evolution for all mechanical tests using a single set of hardening parameters. In addition, an attempt was made to determine an optimized set of hardening parameters at the level of crystal plasticity. This was achieved by simulating different initial crystallographic textures of the material, each of which led to a different set of hardening parameters. Using these, a single optimized set of parameters was extracted from the achieved band, which could adequately predict the mechanical response of the material for all the initial textures.

使用压缩实验，微观结构表征和晶体可塑性有限元建模的混合物研究了镍基高温合金Su-263的变形行为。单轴压缩试验在不同的应变率下进行（$800{\mathrm{s}}^{-\mathrm{1个}}$ -- $2500{\mathrm{s}}^{-\mathrm{1个}}$）和温度（300–1073 K），使用Split-Hopkinson压力棒。使用扫描电子显微镜检查微观结构，并采用电子反向散射衍射技术提供晶体塑性建模所需的必要输入。该模拟使用基于塑性流动的热激活理论的现象学晶体可塑性模型。发现该模型能够使用一组硬化参数来再现所有机械测试的应力-应变曲线和纹理演变。另外，尝试在晶体可塑性水平上确定一组最佳的硬化参数。这是通过模拟材料的不同初始晶体学纹理实现的，每种纹理都导致了不同的硬化参数集。使用这些，