Crack Growth Behavior of 6082 Al Alloys Under Mixed Mode-I Loading

In the current work, the mechanical and fracture toughness properties of 6082 Al alloy have been improved by rolling the alloy to 40% and 70% thickness reductions at cryogenic and room temperatures, respectively. Every cryorolled sample undergoes ageing at various temperatures, i.e., 140°, 160°, and 190 °C to improve the strength, ductility, and fracture toughness. Finite element software (Abaqus) is used to evaluate the behavior of crack growth. The deformation plasticity model, which takes the material’s yield strength into consideration, models the material’s path between its elastic and plastic ranges using a single polynomial function. The results show that the crack progression in 90% CR alloy is found a smaller amount as compared to 40% RTR, 40% CR, 70% RTR, 70% CR, and 90% RTR for the similar geometry, loading and boundary situations as a result of higher dislocations density and construction of sub-grain structures in the CR alloy.