Single-kink relaxation processes in iron–chromium binary alloys

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Abstract

The internal friction spectra in cold-worked pure iron and iron–chromium alloys are measured in the inverted torsion pendulum, operating at 1.8Hz and in the temperature range from 100K to 600 K. The addition of chromium, in combination with a plastic deformation, activates the relaxation process producing an internal friction peak at about 210K. The peak intensity exhibits a strong increase by increasing the concentration of solute atoms. On the basis of the estimated activation energy, Esk = 0.57 eV, and atomistic simulations, this mode is assigned to the single-kink relaxation process corresponding to the recombination of geometrical kinks formed as a result of Cr-dislocation core interaction in the 1/2 screw dislocations.

Details

Original languageEnglish
Pages (from-to)106-108
JournalMaterials Science and Engineering: A
Volume521
DOIs
Publication statusPublished - Apr 2009
EventICIFMS 2008-15th International Conference on Internal Friction and Mechanical Spectroscopy - Perugia, Italy
Duration: 20 Jul 200825 Jul 2008

Keywords

  • internal friction, single kink relaxation, fe-cr alloys, atomic simulation

ID: 127418