Early-stage solute clustering and subsequent precipitation hardening phenomena in aluminum and magnesium alloys

铝和镁合金中的早期溶质团聚和随后的沉淀硬化现象

• 批准号: 283181-2009
• 负责人: Esmaeili, Shahrzad
• 金额: $ 1.46万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=427132
• 关键词: Early; stage; solute; clustering; subsequent

Heat treatable aluminum alloys have been widely used as one of the most important classes of engineering materials due to their combinations of desirable properties. These alloys can achieve high strength levels if their hardening capability is suitably exploited. This potential is of tremendous importance for automotive panel applications where the alloys can be hardened during paint baking processes. Such processes use cost-efficient routes with short heating times and low temperatures, during which the alloys undergo structural changes at nanometer scale. A deep understanding of these changes and the effect of manufacturing parameters in dictating the direction for these changes can provide the necessary tools for optimizing processes and maximizing the strength of the finished products. Recently, magnesium alloys have also attracted significant attention for the design of lightweight structural components, as well as degradable biomaterials. A number of currently-produced Mg alloys are heat treatable and have shown hardening capability. However, a thorough knowledge of the effect of processing on their hardening behaviour is lacking.

可热处理铝合金由于其具有理想性能的组合而被广泛用作最重要的一类工程材料。如果适当地利用这些合金的硬化能力，它们可以达到高强度水平。这种潜力对于汽车面板应用非常重要，因为合金可以在烤漆过程中硬化。此类工艺采用具有成本效益的路线，加热时间短，温度低，在此期间合金会发生纳米级的结构变化。深入了解这些变化以及制造参数对决定这些变化方向的影响，可以为优化工艺和最大化成品强度提供必要的工具。最近，镁合金在轻质结构部件以及可降解生物材料的设计方面也引起了人们的广泛关注。目前生产的许多镁合金都是可热处理的并且具有硬化能力。然而，人们对加工对其硬化行为的影响缺乏全面的了解。