Nanostructure and properties of a Cu-Cr composite processed by severe plastic deformation.

Xavier Sauvage (1) , Peter Jessner (1) , François Vurpillot (1) , Reinhard Pippan (2)

1 GPM - Groupe de physique des matériaux
2 ESI - Erich Schmid Institute of Materials Science

A Cu-Cr composite was processed by severe plastic deformation to investigate the role of interphase boundaries on the grain size reduction mechanisms. The as-deformed material exhibits a grain size of only 20nm. This gives rise to a dramatic increase of the hardness. Some deformation induced Cu super saturated solid solutions were clearly exhibited and it is shown that they decrease the hardness. The formation of such supersaturated solid solution and their influence on the mechanical properties are discussed.

Mots clés: Nanocomposite; interdiffusion; severe plastic deformation; hardness; copper

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Xavier Sauvage, Peter Jessner, François Vurpillot, Reinhard Pippan. Nanostructure and properties of a Cu-Cr composite processed by severe plastic deformation.. Scripta Materialia, 2008, 58, pp.1125. ⟨10.1016/j.scriptamat.2008.02.010⟩. ⟨hal-00276105⟩