An evaluation of the Ashby model for grain boundary hardening
- 1 May 1974
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 29 (5) , 1125-1132
- https://doi.org/10.1080/14786437408226596
Abstract
The predictions of the Ashby equation for the increase in polycrystal work hardening over that which occurs in single crystals have been compared with stress-strain measurements as a function of grain size for copper and 70–30 brass. The Ashby equation does not apply above ϵ = 0·01 in either material; in copper the equation is quantitatively incorrect below ϵ = 0·01; in brass Lüders strains prevented an examination of behaviour below ϵ = 0·01. These results support a previous suggestion that the Ashby model for grain boundary hardening requires revision.Keywords
This publication has 12 references indexed in Scilit:
- Calculation of true volume grain diameterPublished by Elsevier ,2003
- Comparison of strain hardening in polycrystals and single crystals: The example of copperMetallurgical Transactions, 1974
- On stress relaxation experimentsScripta Metallurgica, 1973
- The accumulation of dislocations during the deformation of polycrystalsActa Metallurgica, 1970
- The relation between polycrystal deformation and single-crystal deformationMetallurgical Transactions, 1970
- The deformation of plastically non-homogeneous materialsPhilosophical Magazine, 1970
- The work-hardening characteristics of Cu and ?-brass single crystals between 4•2 and 500°KPhilosophical Magazine, 1963
- The dislocation density, flow stress and stored energy in deformed polycrystalline copperPhilosophical Magazine, 1963
- The plastic deformation of polycrystalline aggregatesPhilosophical Magazine, 1962
- A study of primary and conjugate slip in crystals of alpha-brassActa Metallurgica, 1955