Nano Archive

Modeling of the effects of athermal flow strength and activation energy for dislocation glide an the nanoindentation creep of nickel thin film at room temperature

Haseeb, A. S. M. A. (2006) Modeling of the effects of athermal flow strength and activation energy for dislocation glide an the nanoindentation creep of nickel thin film at room temperature. COMPUTATIONAL MATERIALS SCIENCE, 37 (3). pp. 278-283. ISSN 0927-0256

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

Nanoindentation creep behaviour of nickel at room temperature has been modeled based on the obstacle-controlled dislocation glide mechanism. Using the model, the effects of two important materials parameters viz. the activation free energy required by dislocation to overcome an obstacle without any aid from external stress, Delta F and the athermal flow strength, tau(0), which is the flow strength of solids at 0 K are systematically studied. It has been found that Delta F plays a dominant role in room temperature creep properties of nickel. The role of Delta F is particularly dominant in determining the time dependent deformation. On the other hand, role of tau(0) is more crucial in the case of instantaneous deformation. (c) 2005 Elsevier B.V. All rights reserved.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9728
Deposited By:JNCASR
Deposited On:20 Oct 2010 07:18
Last Modified:20 Oct 2010 07:18

Repository Staff Only: item control page