Modelling the strength of ultrafine-grained and nanocrystalline fcc metals

Huang, Mingxin and Rivera-Díaz-del-Castillo, Pedro E J and Bouaziz, Olivier and van der Zwaag, Sybrand (2009) Modelling the strength of ultrafine-grained and nanocrystalline fcc metals. Scripta Materialia, 61 (12). pp. 1113-1116. ISSN 1359-6462

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Abstract

A model for predicting the steady-state flow stress in ultrafine-grained and nanocrystalline face-centred cubic metals based on irreversible thermodynamics is presented. Grain size, temperature and strain-rate effects are incorporated. Nanoscale effects are accounted for via dislocation propagation and annihilation mechanisms invoking an Orowan-type dislocation glide mechanism, and a vacancy-mediated annihilation mechanism at the interface, respectively. Model predictions show good agreement with experiments for pure Cu and Al.

Item Type:
Journal Article
Journal or Publication Title:
Scripta Materialia
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
125492
Deposited By:
Deposited On:
24 May 2018 14:06
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:21