Void coalescence and ductile fracture in automotive aluminum alloys

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In recent years, the automotive industry has sought to increase overall fleet fuel efficiency through vehicle weight reduction. Aluminum alloys have gained prominence as a viable lightweight alternative to steel for automotive panels and structural components. However, recent research has revealed that void-damage induces ductile fracture during the forming processes, and therefore, limits the formability of aluminum alloys. Numerical simulations of ductile fracture provide a tool to bridge the microstructural features and forming behaviour in order to improve the microstructures of these alloys to meet the need in the automotive industry. However, despite its technological importance, a fundamental understanding of void coalescence and ductile fracture in aluminum alloys is lacking. Therefore, a systematic investigation of void coalescence and ductile fracture is of great interest.