Journal
SCRIPTA MATERIALIA
Volume 68, Issue 10, Pages 821-824Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.02.001
Keywords
Ultrafine-grained microstructure; Low-cycle fatigue; Shear bands; Microstructural instabilities
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Funding
- Australian Research Council through the Centre of Excellence for Design in Light Metals
- Laureate Fellowship award
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The microstructural response and deformation mechanisms under cyclic and monotonic loading were investigated in a commercially pure Al subjected to grain refinement by cryorolling. A fatigue dependent shear banding and grain coarsening was detected and it was shown that pre-existing shear bands induced by cryorolling play a vital role in this regard. A rapid initial cyclic softening dominated by activation of pre-existing shear bands is replaced by a more gradual cyclic softening dominated by grain coarsening within these shear bands. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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