Ultra-High Strength In Situ Composites Formed by Large Plastic Straining: Structure and Mechanical Properties Modelling

In situ bcc containing multifilamentary composite wires made by large strain axisymmetric drawing excel in their combination of strength and conductivity. Their uniqueness is associated to their internal strain being different from the macroscopic one, which induces in their transverse sections a peculiar curled structure of interfolding ribbon-like fibers. This paper presents a geometrical model of such structure from which the particular strain hardening behavior of these composites and of bulk bcc wires can be successfully calculated.