Temperature dependence of effective stress in severely deformed ultralow-carbon steel

Masaki Tanaka, Kenji Higashida

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2 Citations (Scopus)

Abstract

The effects of severe plastic deformation on the thermal activation of dislocation gliding in ultralow-carbon steel at low temperatures were investigated. This was done by measuring the temperature dependences of the effective stress, activation volume and activation energy. It was found that the values of all these parameters were lower than those for coarse-grained specimens at low temperatures. In coarse-grained materials, the activation energy should increase with a decrease in the effective stress. This phenomenon, which seemed counterintuitive initially, could be physically interpreted on the basis of the fluctuation in the athermal stress.

Original languageEnglish
Pages (from-to)1979-1992
Number of pages14
JournalPhilosophical Magazine
Volume96
Issue number19
DOIs
Publication statusPublished - Jul 2 2016

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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