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原文传递 Analysis of the Potential for New Automotive Uses of Wrought Magnesium

题名：	Analysis of the Potential for New Automotive Uses of Wrought Magnesium
作者：	L. Gaines, R. Cuenca, F. Stodolsky, and S. Wu
关键词：	agnes；analysis；tial；tomo；rough；tent；omot；applications；extrusion；auto
摘要：	The Center for Transportation Research at Argonne National Laboratory has performed a study for the Lightweight Materials Program within the U.S. Department of Energy’s Office of Transportation Materials to evaluate the suitability of wrought magnesium and its alloys to replace steel or aluminum for automotive structural and sheet applications. Vehicle weight reduction is one of the major means available for improving automotive fuel efficiency. Although high-strength steels, Al, and polymers are already being used to achieve signficant weight reductions, substantial additional weight reductions could be achieved by increased use of Mg (whose density is less than one-fourth that of steel and only two-thirds that of Al). Magnesium die castings are currently used in American-built automobiles and trucks to the extent of =4 lb per vehicle but there is no significant use of Mg wrought products for such purposes. This study shows that Mg sheet could be used in automotive body nonstructural and semistructural applications, whereas extrusions could be used in such structural applications as spaceframes. The primary barrier to such uses of wrought Mg is high cost, which has three contributing causes: 1. Magnesium ingot prices usually exceed those of Al by more than the “two-to-three” relative density of the two metals. 2. Rolling costs are greatly in favor of Al for sheet (plate and extrusion costs are comparable). 3. Magnesium parts must usually be formed hot, and may require corrosion protection, thus adding to the final cost. These barriers and others are discussed and recommendations are made for R&D to surmount them and to enable economical large-volume use of Mg wrought products.
报告类型：	科技报告