The mechanical response of an advanced high strength and corrosion resistant 10 % Cr nanocomposite steel (ASTM A1035CS Grade 120) is measured under uniaxial tension and compression at the strain rates of 10⁻⁴ s⁻¹, 10^-2 s^-1, 10⁰ s⁻¹, 700 s⁻¹, and 3000 s⁻¹. The experiments are performed at 22 °C as well as 80 °C to investigate the material behavior at the expected temperature rise due to adiabatic deformation at 15 % strain. Additionally, different compression-shear hat-shaped specimens are tested at quasi-static and dynamic strain rates to investigate the localization behavior of this material. The material exhibits small strain rate sensitivity (SRS) during quasi-static loading, but a pronounced SRS between quasi-static and dynamic strain rates. Tension-compression asymmetry is also observed at both temperatures. Experiments at 80 °C reveal a decrease in flow stress in both tension and compression indicating the material is sensitive to thermal softening due to adiabatic heating. Load-Unload-Reload (LUR) and strain rate jump experiments are performed to investigate the reasoning behind the approximate rate insensitivity of ASTM A1035CS steel during quasi-static strain rates. A new constitutive model is also developed using a novel rate dependent material model with a modified Hockett-Sherby (MHS) hardening model and incorporating Lode angle dependence to capture the tension-compression asymmetry. The model is also used to predict the LUR and strain rate jump experiments. Finally, reasoning behind the unique rate dependent thermo-mechanical behavior of ASTM A1035CS steel is discussed in regards to adiabatic heating, strain-partitioning, and phase transformation.

^{在应变率为 10 -4}  s ^-1、 10 ^{-2 s}  -1 ^、 10 0 的单轴拉伸和压缩条件下测量先进高强度耐腐蚀 10 % Cr 纳米复合钢（ASTM A1035CS Grade 120）的机械响应 s ^-1、700s ^-1和3000s ^-1。实验在 22 °C 和 80 °C 下进行，以研究由于 15% 应变下的绝热变形而导致的预期温升下的材料行为。此外，在准静态和动态应变率下测试了不同的压缩剪切帽形样本，以研究该材料的局部化行为。该材料在准静态加载期间表现出较小的应变率敏感性 (SRS)，但在准静态和动态应变率之间表现出明显的 SRS。在两个温度下也观察到张力-压缩不对称性。80 °C 下的实验表明，拉伸和压缩的流动应力均有所下降，表明该材料对绝热加热导致的热软化敏感。进行加载-卸载-重新加载 (LUR) 和应变率跳跃实验，以研究 ASTM A1035CS 钢在准静态应变率期间近似速率不敏感性背后的原因。还使用新型速率相关材料模型和改进的 Hockett-Sherby (MHS) 硬化模型开发了一种新的本构模型，并结合洛德角依赖性来捕获拉压不对称性。该模型还用于预测 LUR 和应变率跳跃实验。最后，讨论了 ASTM A1035CS 钢独特的速率相关热机械行为背后的绝热加热、应变分配和相变的推理。