Aluminum-based alloys with advanced processing and service properties are required for the automotive and airspace industries. The current study focuses on the microstructure, recrystallization behavior, and elevated- and room-temperatures tensile properties of the novel Al-Cu-Er-Zr-based alloy pretreated using different homogenization annealing regimes. Aluminum solid solution, Al₈Cu₄Er phases of crystallization origin, and nanoscale L1₂-Al₃(Er,Zr) precipitates were observed in the studied alloy. The alloy exhibited a non-recrystallized structure after annealing of cold-rolled sheets at 300°C, with yield strength of 300 MPa and ultimate tensile strength of 330 MPa at room temperature. The fine-grained structure of the alloy provided superplasticity with elongation to failure up to 450% in the temperature range of 550°C to 605°C and a strain rate range of 10^–3 s^–1 to 10^–2 s^–1.

汽车和航空航天工业需要具有先进加工和服务性能的铝基合金。目前的研究重点是使用不同均质化退火方案预处理的新型 Al-Cu-Er-Zr 基合金的微观结构、再结晶行为以及高温和室温拉伸性能。铝固溶体、结晶来源的Al ₈ Cu ₄ Er 相和纳米级 L1 ₂ -Al ₃在所研究的合金中观察到 (Er,Zr) 析出物。该合金经300℃冷轧退火后呈现未再结晶组织，室温下屈服强度为300 MPa，极限抗拉强度为330 MPa。合金的细晶粒结构提供了超塑性，在 550°C 至 605°C 的温度范围内和应变速率范围为 10 ^–3 s ^–1至 10 ^–2 s ^–1时断裂伸长率高达 450% 。