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Life Cycle Assessment of a Transmission Case: Magnesium vs. Aluminum

CSS Publication Number
Full Publication Date
February 23, 1998

This paper describes a Life Cycle Assessment (LCA) done to evaluate the relative environmental performance of magnesium (Mg) and aluminum (Al) automatic transmission cases. Magnesium is considered a lighter weight substitute for aluminum in this application. Light weighting of vehicles increases fuel economy and is an important vehicle design metric.

The objective of this LCA is to quantify energy and other environmental trade-offs associated with each alternative for material production, manufacturing, use, and end-of-life management stages. Key features of the inventory modeling and the data collection and analysis methods are included in this paper along with life cycle inventory profiles of aluminum and magnesium alternatives. The life cycle inventory (LCI) was interpreted using a set of environmental metrics and areas needing further research were identified. A qualitative cost assessment was done in conjunction with this LCA to highlight potential cost drivers.

Research Areas
Mobility Systems
Publication Type
Digital Object Identifier
Full Citation
Reppe, Peter, Gregory A. Keoleian, Rebecca L. Messick and Mia Costic. 1998. Life Cycle Assessment of a Transmission Case: Magnesium vs. Aluminum. Society of Automotive Engineers International. Paper No. 980470.