Nonlinear neck formation in zirconium alloys

  • T. M. Poletika
  • A. P. Pshenichnikov


The macrolocalization of plastic strain in samples of zirconium alloys with hexagonal close-packed structure under uniaxial tension was studied by laser speckle interferometry and surface profiling. The occurrence of oscillatory instability in the parabolic stage of plastic flow of zirconium alloys was found to be due to a local nonuniform change of the sample shape. The kinetics of process was shown to be determined by oscillatory changes in the contraction and elongation strains at the macrolocalization site in the hardening-softening regime.

Key words

zirconium alloys strain localization instability fracture 


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Copyright information

© MAIK/Nauka 2009

Authors and Affiliations

  1. 1.Institute of Physics of Strength and Materials Science, Siberian DivisionRussian Academy of SciencesTomskRussia

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