Reduction of Residual Quenching Stresses in 2A14 Aluminum Alloy Tapered Cylinder Forgings via a Novel Cold Bulging Process

This study combined finite element method (FEM) simulations and physical experiments to develop a novel cold bulging process, with the aim of studying mitigating quenching residual stresses in 2A14 tapered cylinder forgings. The samples underwent at different ratios (0–4.0%) evaluate stress reduction performance (via hole-drilling strain-gauge method) improvements their mechanical properties. FEM simulation experimental results revealed that our proposed process reduced by up 85–87%. density uniformity precipitated phases increased along extent bulging, as confirmed transmission electron microscope (TEM) observations. Furthermore, compared unprocessed samples, tensile yield strengths, elongation 3% were significantly enhanced (65 MPa, 55 1.7%, respectively).