The 2195 aluminum alloy has been widely utilized in the aerospace field, of which dynamic recrystallization microstructures have a substantial effect on the mechanical properties of aerospace parts. In this study, 2195 aluminum alloy was compressed at 300–520 °C using a Gleeble 3500-GTC thermo-mechanical testing system. The discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) behavior of 2195 aluminum alloy at medium/high temperature was studied. The results demonstrated that during medium temperatures (300–360 °C) deformation the main softening mechanism was DDRX, and at high temperatures (420–520 °C), it was CDRX. CDRX of 2195 aluminum alloy involved three types of subgrain-forming mechanisms: dislocation tangling to form subgrains, microscopic shear bands to form subgrains, and the coalescence of two small subgrains to form larger subgrains. In addition, several recrystallized grains underwent geometric dynamic recrystallization (GDRX) at high temperature and extensive deformation (480 °C-80% or 520 °C-60%).

2195铝合金已广泛用于航空航天领域，其中的动态再结晶微结构对航空航天零件的机械性能具有重大影响。在这项研究中，使用Gleeble 3500-GTC热机械测试系统在300–520°C下压缩了2195铝合金。研究了2195铝合金在中/高温下的不连续动态重结晶（DDRX）和连续动态重结晶（CDRX）行为。结果表明，在中等温度（300–360°C）变形期间，主要的软化机理是DDRX，而在高温（420–520°C）时，其软化机理是CDRX。2195铝合金的CDRX涉及三种类型的亚晶粒形成机制：位错缠结形成亚晶粒，微观剪切带形成亚晶粒，并合并两个小的子粒子以形成更大的子粒子。此外，一些重结晶晶粒在高温和大变形（480°C-80％或520°C-60％）下经历了几何动态重结晶（GDRX）。