Surface roughening behavior of Al-Mg alloys during deformation

自20世纪70年代能源危机显现的S以来，汽车制造商一直试图通过提高发动机和其他部件的效率等各种方法来降低汽车的燃油消耗。最近，《京都协议》规定的全球减少环境排放的努力使这一努力更加激烈。此外，材料领域的技术发展使汽车设计师和生产商能够在几个汽车部件中采用塑料和金属等轻质材料。在汽车车身上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的技术，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可涂装铝汽车覆盖件成形和热处理有关的变量。考虑中的铝合金通过化学成分和热处理的组合来获得其强度。然而，与制造这些覆盖件相关的成形工艺影响材料的强度，烤漆工艺也是如此。由于外观在这一应用中也非常重要，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由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。*这项调查的结果对加拿大主要的铝合金生产商加拿大铝业公司来说是有意义的，应该会增加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.