The Process Design and Rapid Superplastic Forming of Industrial AA5083 for a Fender with a Negative Angle in a Small Batch

A front automobile fender with a negative angle was trial produced via rapid superplastic forming (SPF) technology. The tensile test of industrial AA5083 carried out at elevated temperatures, and the results showed that maximum elongation 242% 480 °C/0.001 s−1. rigid-plastic constitutive model SPF process established. Initial dies preforming final were designed. finite element method (FEM) used to simulate predict thickness distribution different areas. Furthermore, optimized make uniform. In structure, thinning ratio decreased from 83.2% 63% due design dies. then successfully fabricated by °C. measurement out, minimum structure 2.17 mm transverse tank, while 2.49 near edge lamp orifice. average grain size grew 20 35 μm. growth led reduction mechanical properties. Compared properties initial material, decrease in strength for material after 5.78%, 18.5%.