Combined Effects of Pre-deformation and Natural Aging on Creep Aging Behavior of 2A14 Aluminum Alloy: A Hybrid Constitutive Modeling Approach
摘要
This study systematically investigates the combined effects of pre-deformation and natural aging (NA) on the creep aging (CA) behavior of 2A14 aluminum alloy, aiming to optimize the forming precision and mechanical properties of aerospace load-bearing components. Experimental and computational analyses demonstrate that pre-deformation significantly suppresses NA-induced hardening, with higher pre-strain levels (0%, 4%, 8%) accelerating the attainment of peak NA strength. CA tests conducted at varying pre-strain levels revealed that pre-deformation significantly enhances both creep strain and creep rate while mitigating the effects of NA. Microstructural characterization via XRD and TEM demonstrated that pre-deformation promotes