Critical grain size for dislocation storage and consequences for strain hardening of nanocrystalline materials

Olivier Bouaziz; Y. Estrin; Yves Brechet; J.D. Embury

doi:10.1016/j.scriptamat.2010.05.006

Journal articles

Critical grain size for dislocation storage and consequences for strain hardening of nanocrystalline materials

Olivier Bouaziz ^{1, 2} Y. Estrin ^{3, 4} Yves Brechet ⁵ J.D. Embury ⁶

1 ArcelorMittal Maizières Research SA

2 MAT - Centre des Matériaux

3 ARC Centre of Excellence for Design in Light Metals

4 CSIRO Division of Materials Science and Engineering

5 SIMaP - Science et Ingénierie des Matériaux et Procédés

6 McMaster University [Hamilton, Ontario]

Abstract : We consider strain hardening of nanostructured materials and propose a physically based interpretation of their low strain hardening capability in terms of a reduced storage rate of dislocations. The model suggested provides a modification of the Kocks–Mecking–Estrin evolution law for dislocation storage for nanostructured materials and predicts a critical grain size below which the strain hardening rate drops off.

Keywords : Strain hardening Nanostructure Dislocations Diffusion

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Materials

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https://hal-mines-paristech.archives-ouvertes.fr/hal-00509787
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Submitted on : Monday, August 16, 2010 - 2:38:09 PM
Last modification on : Tuesday, February 16, 2021 - 3:22:06 PM

Critical grain size for dislocation storage and consequences for strain hardening of nanocrystalline materials

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