Void coalescence and ductile fracture in automotive aluminum alloys

汽车铝合金中的空洞聚结和延性断裂

• 批准号: 312330-2010
• 负责人: Chen, Zengtao
• 金额: $ 3.5万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=526470
• 关键词: Void; coalescence; ductile; fracture; automotive

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.

近年来，汽车工业已经寻求通过减轻车辆重量来提高整体车队燃料效率。铝合金作为汽车面板和结构部件的钢的可行轻质替代品已经获得了突出地位。然而，近年来的研究发现，孔洞损伤在铝合金成形过程中会导致韧性断裂，从而限制了铝合金的成形性能。韧性断裂的数值模拟提供了一种工具，以桥梁的微观组织特征和成形行为，以改善这些合金的微观结构，以满足汽车工业的需要。然而，尽管它的技术重要性，在铝合金中的空洞聚结和韧性断裂的基本理解是缺乏的。因此，系统地研究空穴聚合和韧性断裂具有重要意义。