Journal
MATERIALS LETTERS
Volume 133, Issue -, Pages 151-154Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2014.06.153
Keywords
Grain size softening/inverse Hall-Petch effect; Grain boundary sliding; Rate controlling process; Quasi-crystals; Nanocrystalline materials
Ask authors/readers for more resources
Inverse Hall-Petch effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (similar to a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available