To improve the recrystallization resistance of 2195 Al–Cu–Li alloys, we proposed a two-step homogenization (TS) to facilitate the homogeneous nucleation of Al₃Zr, and the effect of Al₃Zr precipitate on the recrystallization behavior and on the strength and ductility of 2195 alloys were investigated. It is shown that the first low-temperature homogenization in TS promotes the nucleation of Al₃Zr due to large driving force, and second high-temperature homogenization helps to accelerate diffusion process of Zr, resulting in fine and dense Al₃Zr distribution (radius of 22.6 ± 4.1 nm and number density of 1.94 × 10²⁰/m³). As a result, the recrystallization resistance of 2195 alloys is significantly improved comparing with those treated by the traditional one-step homogenization (OS). The TS alloys exhibits best yield strength (566.7 MPa), tensile strength (598.8 MPa) and elongation of 11.9% comparing with OS alloys. The strength improvement of TS 2195 alloys mainly originates from Orowan mechanism and grain refinement induced by Al₃Zr precipitate. The remained deformed lamellar structure in TS alloys effectively deflectes and zigzags the propagation of cracks, which is beneficial to the energy dissipation, leading to the enhancement of ductility.

为了提高 2195 Al-Cu-Li 合金的抗再结晶能力，我们提出了两步均质化 (TS) 以促进 Al ₃ Zr的均质形核，以及 Al ₃ Zr 析出物对再结晶行为和强度的影响2195合金的延展性和延展性进行了研究。结果表明，TS中的第一次低温均质化由于驱动力大而促进了Al ₃ Zr的形核，第二次高温均质化有助于加速Zr的扩散过程，导致Al ₃ Zr分布（半径22.6 ± 4.1 nm 数密度 1.94 × 10 ²⁰ /m ³）。结果，与传统一步均质化（OS）处理的合金相比，2195合金的抗再结晶性能得到显着提高。与 OS 合金相比，TS 合金表现出最佳的屈服强度 (566.7 MPa)、拉伸强度 (598.8 MPa) 和 11.9% 的伸长率。TS 2195合金强度的提高主要来源于Orowan机制和Al ₃ Zr析出物引起的晶粒细化。TS合金中残留的变形层状结构有效地偏转和曲折裂纹的扩展，有利于能量耗散，从而提高延展性。