Influence of Heat Treatments and Straining Steps on Mechanical Properties in the Stretch Forming Process

摘要

In the aerospace industry, stretch forming of heat-treatable aluminium sheet is a widely used forming method. Simulation of the stretch forming process with FEM is helpful to predict the strain distribution in complex products, to find out the limits of the forming process, and to optimize the amount of strain in each step. Therefore, tensile tests are carried out to determine the influence of intermediate annealing in combination with straining steps on the mechanical properties of AA2024 T3. Since multiple stretching steps with intermediate annealing can influence the grain size and cause visible defects, the development of the grain size in AA2024 T3 is also studied.