Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1564092 | Computational Materials Science | 2006 | 6 Pages |
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, ΔF and the athermal flow strength, τ0, which is the flow strength of solids at 0 K are systematically studied. It has been found that ΔF plays a dominant role in room temperature creep properties of nickel. The role of ΔF is particularly dominant in determining the time dependent deformation. On the other hand, role of τ0 is more crucial in the case of instantaneous deformation.
Related Topics
Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
A.S.M.A. Haseeb,