Papers by Author: Philippe Pareige

Abstract: Microstructures of cold drawn pearlitic steel wires were investigated by three-dimensional atom probe (3D-AP) to understand the influence of alloying elements on the decomposition of cementite. Before cold drawing, Si is mostly located in the ferrite phase, while Cr is located in the Fe3C phase and the amount of Mn is similar in Fe3C and in ferrite. Higher Si amount leads to higher dissolution rate of cementite and Cr has a little effect on cementite decomposition during drawing.

Abstract: Copper-carbon composites (where carbon can be graphite, carbon-fibers, fullerenes and carbon nanotubes) are used and under investigations for various applications. The reported manufacturing methods are diverse, but, to our best knowledge, no process is available to fabricate a multifilamentary Copper-Graphite wire with a large number of graphite filaments. We describe a new processing route, which allows the fabrication of such composite by severe plastic deformation. The resulting microstructures and electrical properties are presented and discussed.