The hot deformation behavior of a newly developed AA6099 alloy was investigated after homogenization. To this end, Gleeble® isothermal hot compression tests were performed at temperatures of 350, 400, 450, and 500 °C, and strain rates of 0.01, 0.1, and 1 s⁻¹ up to a true strain of 0.8. The dependency of the flow stress on the deformation temperature, strain, and strain rate was analyzed. In addition, the constitutive equations relating the flow stress to the deformation temperature and strain rate were derived using a power-law empirical model. Also, the microstructures and dynamic softening mechanisms of the alloy under various deformation conditions were examined using light optical microscopy (LOM) and electron back scattered diffraction (EBSD) techniques. The correlation between the flow behavior, different microstructures, and dynamic softening mechanisms at various hot compression conditions was determined. The kinetic analysis and microstructural evolution indicated that the main flow softening mechanism for homogenized AA6099 was dynamic recovery (DRV). Partial dynamic recrystallization (DRX) enhanced the flow softening especially at low deformation temperatures and high strain rates, i.e., at high Zener-Hollomon parameter (Z) values.

均质后研究了新开发的AA6099合金的热变形行为。为此，在350、400、450和500°C的温度下以及0.01、0.1和1 s ^-1的应变率下进行了Gleeble®等温热压缩测试。达到0.8的真实应变。分析了流动应力对变形温度，应变和应变率的依赖性。此外，使用幂律经验模型导出了将流动应力与变形温度和应变率相关的本构方程。另外，使用光学显微镜（LOM）和电子背散射衍射（EBSD）技术检查了合金在各种变形条件下的微观结构和动态软化机理。确定了在各种热压缩条件下的流动行为，不同的微观结构和动态软化机制之间的相关性。动力学分析和微观结构演变表明，均质AA6099的主要流动软化机理是动态恢复（DRV）。即，在高的齐纳-所罗门参数（Z）值下。