Surface roughening behavior of Al-Mg alloys during deformation

自20世纪70年代能源危机变得明显以来，汽车制造商一直试图使用各种方法来减少汽车的燃料消耗，例如提高发动机和其他部件的效率。 最近全世界按照《京都雅阁》的规定努力减少环境排放，使这一努力更加强烈。 此外，材料领域的技术发展使汽车设计者和生产者能够在几个汽车部件中采用轻质材料，如塑料和钢以外的金属。 近年来，在汽车车身中广泛使用铝合金的可能性已经被引入，铝生产商和研究人员正在努力开发新技术，使这种主要材料的替代成为可能。 目前提出的研究项目涉及检查与成型和热处理的可涂漆铝汽车板的变量。 所考虑的铝合金通过化学成分和热处理的组合获得其强度。 然而，与这些面板的制造相关的成形工艺会影响材料的强度，就像烤漆工艺一样。 由于外观在该应用中也非常重要，因此必须确定这些铝合金的腐蚀行为特征和由此产生的表面光洁度。 拟议的项目将详细检查铝合金的腐蚀行为和所考虑的制造工艺产生的表面光洁度。 更具体地说，将确定化学成分对耐腐蚀性的影响以及表面处理对最终光洁度的影响。 这项调查的结果引起了加拿大主要铝合金生产商加拿大铝业公司的兴趣，并应提高加拿大在全球市场的竞争力。

Since the 1970's when the energy crisis became apparent, automobile manufacturers have been trying to reduce the fuel consumption of automobiles using various ways such as increasing the efficiency of engines and other components.  The recent worldwide effort to reduce environmental emissions, as prescribed in the Kyoto Accord, has made this effort more intense.  In addition, technological developments in the area of materials, have enabled automobile designers and producers to incorporate light-weight materials such as plastics and metals other than steel in several automobile components.  Recently, the possibility of employing aluminum alloys in automobile bodies widely has been introduced and aluminum producers and researchers are making efforts to develop new technologies which would make this major material substitution possible.  The present proposed research project deals with examining the variables involved with forming and heat treating a paintable aluminum automobile panel.  The aluminum alloys under consideration obtain their strength through a combination of chemical composition and heat treatment.  However, the forming processes associated with the manufacturing of these panels affect the strength of the material as does the paint-baking process.  Since appearance is also very important in this application, the corrosion behaviour characteristics and the resulting surface finish of these aluminum alloys must be established.  The proposed project will examine the corrosion behaviour of the aluminum alloys and the surface finish resulting from the manufacturing process used under consideration in detail.  More specifically, the effect of chemical composition on the corrosion resistance and the effect of surface preparation on the final finish will be established.  The results of this investigation are of interest to Alcan, a major Canadian producer of aluminum alloys, and should increase Canada's competitiveness in the global market.