Copper-Tantalum Metal Matrix Composites Consolidated from Powder Blends by Severe Plastic Deformation Academic Article

abstract

• We investigated the effectiveness of severe plastic deformation by equal channel angular extrusion (ECAE) for consolidation of metal powders into metal matrix composites. Equal volumes of copper (Cu) and tantalum (Ta) powders were consolidated at ambient temperature via different ECAE routes. Composites processed by ECAE routes 4E and 4Bc were also processed at 300 °C. The resulting materials were characterized by scanning electron microscopy (SEM) and compression testing. Processing by route 4Bc at 300 °C resulted in the highest compressive strength, lowest anisotropy, and least strain rate sensitivity. We conclude that the superior properties achieved by this route arise from mechanical bonding due to interlocking Cu and Ta phases as well as enhanced metallurgical bonds from contact of pristine metal surfaces when the material is sheared along orthogonal planes.

authors

• Demkowicz, Michal

published proceedings

• METALS

author list (cited authors)

• Levin, Z. S., Demkowicz, M. J., & Hartwig, K. T.

citation count

• 0

complete list of authors

• Levin, Zachary S||Demkowicz, Michael J||Hartwig, Karl T

publication date

• June 2021

publisher

• MDPI  Publisher

published in

• Metals  Journal

keywords

• Copper-tantalum
• Equal Channel Angular Extrusion Ecae
• Metal Matrix Composite Mmc
• Powder Consolidation
• Severe Plastic Deformation

Digital Object Identifier (DOI)

• 10.3390/met11071010

start page

• 1010

end page

• 1010

volume

• 11

issue

• 7

URL

• http://dx.doi.org/10.3390/met11071010