A practical condition for migration dynamic recrystallization

被引：18
作者：
Barnett, M. R. [1 ]
机构：
[1] Deakin Univ, ARC Ctr Excellence Design Light Met, CMFI, Geelong, Vic 3217, Australia
来源：
ACTA MATERIALIA | 2007年 / 55卷 / 09期
基金：
澳大利亚研究理事会;
关键词：
dynamic recrystallization; metals; boundary mobility;
D O I：
10.1016/j.actamat.2007.01.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A readily evaluated condition for migration dynamic recrystallization is developed. It is based on the postulate that "the distance traversed by the boundary of a hypothetical growing grain in the time taken for the attainment of a recovery steady state must exceed the size of a critical nucleus". A method for estimating the boundary mobility based on the kinetics of static recrystallization is also developed to facilitate evaluation of the condition. The derivation focuses first on developing an upper limit for the dynamically recrystallized grain size. This upper limit is only slightly higher than experimental values. The critical condition also agrees well with a limited set of experimental data. These data include the occurrence (and, in two cases, suppression) of dynamic recrystallization in Cu, Ni, Mg, alpha-Fe, gamma-Fe and Al. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3271 / 3278
页数：8
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