Surface roughening behavior of Al-Mg alloys during deformation

自从20世纪70年代能源危机变得明显以来，汽车制造商一直在试图通过各种方式减少汽车的燃料消耗，例如提高发动机和其他部件的效率。根据《京都议定书》的规定，最近世界范围内减少环境排放的努力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师和制造商能够在几种汽车部件中采用轻质材料，如塑料和金属，而不是钢。最近，铝合金在汽车车身上广泛应用的可能性已经被介绍出来，铝生产商和研究人员正在努力开发新技术，使这种主要的材料替代成为可能。目前提出的研究项目涉及检查与成形和热处理可涂装铝汽车板的变量。所考虑的铝合金通过化学成分和热处理的结合获得其强度。然而，与制造这些面板相关的成型过程会影响材料的强度，就像烤漆过程一样。由于外观在这种应用中也非常重要，因此必须确定这些铝合金的腐蚀行为特征和最终的表面光洁度。拟议的项目将详细检查铝合金的腐蚀行为和制造过程中产生的表面光洁度。更具体地说，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将被确定。加拿大铝业公司是加拿大主要的铝合金生产商，此次调查的结果与该公司的利益相关，并将提高加拿大在全球市场上的竞争力。

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.