Structural-orientational instability of plastic flow in Zr–1% Nb alloy

T. M. Poletika, A. P. Pshenichnikov, S. L. Girsova

Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk

Abstract: It is established that the instability of plastic flow observed in a hardening-softening regime in Zr–1% Nb alloy at the parabolic stage of the curve of strain hardening (irrespective of the dislocation-related) is accompanied by the geometric hardening (softening) as a result of the reorientation of slip planes relative to the axis of loading. This reorientation accounts for a periodic change in the Schmid factors for prismatic and conjugate basal slip systems.

Received: 08.11.2010

 English version: Technical Physics Letters, 2011, 37:4, 298–301

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