Solids

Microtexture and microstructure evolution during necking in a 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: The evolution of a microstructure and Schmid factors during tension under necking conditions are analyzed by electron backscatter diffraction. The oscillatory instability of the plastic flow in the deformation zone in the hardening-softening mode is found to be related to geometrical hardening (softening) during the reorientation of easy slip planes in grains with respect to the loading axis. A relation between the activities of various slip systems and the evolution of quantitative microstructure parameters is revealed.

Received: 28.02.2011

 English version: Technical Physics, 2011, 56:11, 1624–1629

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