2236 Effect of Additional Shear Strain Layer on Strength and Ductility of Fine Drawn Wire

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  • 2236 細線材の表層部付加的せん断ひずみ層が材料特性におよぼす影響 第2報(S24-1 高機能・高付加価値の棒線管材の加工技術(1),S24 高機能・高付加価値の棒線管材の加工技術)

Abstract

Fine wires around the order of 0.1mm in diameter have become popular for mechanical and electrical applications. In general, fine wires produced by the drawing process are required to have both high strength and high ductility. In the wire drawing process, a large shear deformation zone with a hardened layer, referred to as the "additional shear strain layer," is generated beneath the surface layer of the wire. It is expected that this layer have high tensile strength and maintain ductility because of its fine microstructure. Hence, we investigate the effect of the additional shear strain layer on fiber texture. In summary, the crystal orientation of the surface layer is shown to be different from that of the center layer. It is confirmed that the additional shear deformation affected the fiber texture of the surface layer.

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