contributor author | A. D. Freed | |
contributor author | K. P. Walker | |
contributor author | S. V. Raj | |
date accessioned | 2017-05-08T23:38:37Z | |
date available | 2017-05-08T23:38:37Z | |
date copyright | January, 1992 | |
date issued | 1992 | |
identifier issn | 0094-4289 | |
identifier other | JEMTA8-26946#46_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/110354 | |
description abstract | The activation energy for creep at low stresses and elevated temperatures is associated with lattice diffusion, where the rate controlling mechanism for deformation is dislocation climb. At higher stresses and intermediate temperatures, the rate controlling mechanism changes from dislocation climb to obstacle-controlled dislocation glide. Along with this change in deformation mechanism occurs a change in the activation energy. When the rate controlling mechanism for deformation is obstacle-controlled dislocation glide, it is shown that a temperature-dependent Gibbs free energy does better than a stress-dependent Gibbs free energy in correlating steady-state creep data for both copper and LiF-22mol percent CaF2 hypereutectic salt. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Stress Versus Temperature Dependence of Activation Energies for Creep | |
type | Journal Paper | |
journal volume | 114 | |
journal issue | 1 | |
journal title | Journal of Engineering Materials and Technology | |
identifier doi | 10.1115/1.2904139 | |
journal fristpage | 46 | |
journal lastpage | 50 | |
identifier eissn | 1528-8889 | |
keywords | Creep | |
keywords | Temperature | |
keywords | Stress | |
keywords | Dislocations | |
keywords | Mechanisms | |
keywords | Deformation | |
keywords | Gibbs' free energy | |
keywords | Steady state | |
keywords | Diffusion (Physics) AND Copper | |
tree | Journal of Engineering Materials and Technology:;1992:;volume( 114 ):;issue: 001 | |
contenttype | Fulltext | |