Please use this identifier to cite or link to this item:
Title: Role of recovery in high temperature constant strain rate deformation
Authors: Ajaja, O. 
Issue Date: Jan-1991
Citation: Ajaja, O. (1991-01). Role of recovery in high temperature constant strain rate deformation. Journal of Materials Science 26 (24) : 6599-6605. ScholarBank@NUS Repository.
Abstract: A model based on the three-dimensional distribution of dislocations is used to delineate the role of recovery during high temperature constant strain rate deformation. The model provides a good semi-quantitative explanation for classical work-hardening as well as for high temperature work-softening resulting from rapid recovery. It predicts linear work-hardening, whereby the ratio of the work-hardening rate, H, to the shear modulus, G, is constant when a crystal is tested in the absence of recovery. The slope of the stress-strain curve, θ, for high temperature deformation is related to the low temperature work-hardening rate H; the dislocation annihilation rate {Mathematical expression}, the flow stress a, the free dislocation density ρ, the strain rate {Mathematical expression}, and a parameter which is sensitive to the dislocation distribution. A modified version of the Bailey-Orowan equation for simultaneous work-hardening and recovery during constant strain rate deformation which is derived from the model takes the form {Mathematical expression} where R is the rate of recovery and η(t) which is time-dependent during the transient stage of deformation, is determined by such factors as σ, ρ and the details of the dislocation distribution. © 1991 Chapman & Hall.
Source Title: Journal of Materials Science
ISSN: 00222461
DOI: 10.1007/BF00553683
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Dec 8, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.