Paper Title:
An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals
  Abstract

Our earlier published creep data are analyzed for ultrafine-grained pure aluminium and copper processed by equal-channel angular pressing (ECAP). The analysis demonstrates conclusively that creep occurs in the investigated materials after ECAP by the same mechanism as in conventional coarse-grained materials with intergranular dislocation glide and climb as the dominant rate-controlling flow process. Under creep conditions examined in this work diffusion creep is not important in pure aluminium and copper because the ultrafine grains are unstable at elevated and/or high temperature creep and the grains grow sufficiently to preclude any significant contribution from Nabarro-Herring or Coble creep.

  Info
Periodical
Edited by
Pavel Šandera
Pages
382-385
DOI
10.4028/www.scientific.net/KEM.465.382
Citation
M. Kvapilová, V. Sklenička, J. Dvořák, P. Král, "An Evaluation of Creep Mechanisms in Ultrafine-Grained Metals", Key Engineering Materials, Vol. 465, pp. 382-385, 2011
Online since
January 2011
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