Evolution of mechanisms of plastic deformation in porous metals

V. E. Panin, V. V. Polyakov, G. V. Syrov, A. V. Fadeev

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Abstract

An experimental study was made of the structure of deformed porous iron with a porosity P ranging from 4 to 40% within the range of strains ε up to fracture. Measurements are made of grain-boundary slip and rotations of structural elements and their individual contributions to the total strain as a function of P and ε. It is established that there is a change in the dominant mechanisms of plastic deformation with an increase in porosity, this change being connected with a change in the topological characteristics of the system and corresponding to the transition from intergranular slip to a group of mechanisms that ensures movement of the grains as a whole. The established laws are analyzed on the basis of the concept of structural levels of deformation.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalRussian Physics Journal
Volume39
Issue number1
DOIs
Publication statusPublished - 1 Jan 1996

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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