Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Book Chapter

Publication Version

Published Version

Publication Date

1995

Journal or Book Title

Aluminum and Magnesium for Automotive Applications

First Page

173

Last Page

187

Abstract

Metal-metal fiber-reinforced composites with high ductility and high strength have previously been produced by deformation processing Cu and Ti binary alloys. Mg-X alloys (where X =Ti, Nb, and Fe) have also been deformation processed to produce high-strength, high-ductility composites which have stable microstructures when exposed to 400°C for 500 hours. In these experiments, metal-metal composites consisting of a matrix of Mg or Mg-12wt%Li-2wt%Nd were produced by infiltrating a 10-20% dense steel wool with the molten matrix alloy. The Mg/IOSW material did not roll well, even at 300°C. However, the Mg-12Li-2Nd/20SW had excellent ductility at room temperature and it was reduced 99.6% without annealing, producing a composite sheet with highly elongated, nano-scale steel filaments. These Mg-based composites were evaluated by mechanical testing, microscopy, and high-temperature annealing to determine the relation between processing, microstructure, and properties. It is believed that deformation processing can be used to successfully develop a Mg-based composite with low density, high strength, high ductility, high fracture toughness, and excellent thermal stability. Such a Mg-based composite would represent a truly unique method for producing commercially viable structural materials.

Comments

This chapter is published as Jensen, J. A., Alan M. Russell, T. W. Ellis, and L. Scott Chumbley. "Magnesium-based Metal-Metal Composites." In Aluminum and Magnesium for Automotive Applications. (Proceedings of a symposium sponsored by the Structural Materials Division (SMD) Non-Ferrous Metals Committee of the Minerals, Metals & Materials Society (TMS), J. Daniel Bryant and Dawn R. White, eds.) Warrendale, PA: The Minerals, Metals & Materials Society, 1996. Pages 173-187. Posted with permission.

Copyright Owner

The Minerals, Metals & Materials Society

Language

en

File Format

application/pdf

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