Modelling the strength of ultrafine-grained and nanocrystalline fcc metals

被引：17

作者：

Huang, Mingxin ^{[1
,2
]}

Rivera-Diaz-del-Castillo, Pedro E. J. ^{[1
]}

Bouaziz, Olivier ^{[2
]}

van der Zwaag, Sybrand ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands

[2] ArcelorMittal Res, F-57283 Maizieres Les Metz, France

来源：

SCRIPTA MATERIALIA | 2009年 / 61卷 / 12期

关键词：

Ultrafine-grained; Nanocrystalline; Dislocation density; Flow stress; Irreversible thermodynamics; STEADY-STATE DEFORMATION; MECHANICAL-PROPERTIES; THERMODYNAMICS; STRESS; DISLOCATIONS; STEELS; COPPER;

D O I：

10.1016/j.scriptamat.2009.09.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1113 / 1116

页数：4

共 20 条

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