The effect of coarse second-phase particles on the rate of grain refinement during severe deformation processing

被引：256
作者：
Apps, PJ
Bowen, JR
Prangnell, PB
机构：
[1] Univ Manchester, Inst Sci & Technol, Ctr Mat Sci, Manchester M1 7HS, Lancs, England
[2] Riso Natl Lab, Mat Dept, DK-4000 Roskilde, Denmark
来源：
ACTA MATERIALIA | 2003年 / 51卷 / 10期
基金：
英国工程与自然科学研究理事会;
关键词：
severe plastic deformation; ultrafine grained microstructure; grain refining; second-phase particles; aluminium alloys;
D O I：
10.1016/S1359-6454(03)00086-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of second-phase particles on the rate of grain refinement during severe deformation processing has been investigated, by comparing the microstructure evolution in an AA8079 aluminium alloy, containing 2.5 vol.% of similar to2 gm particles, with that in a high purity, single-phase, Al-0.13% Mg alloy, deformed identically by ECAE to an effective strain of ten. The materials were analysed by high-resolution EBSD orientation mapping, which revealed that grain refinement occurred at a dramatically higher rate in the particle-containing alloy. A submicron grain structure could be achieved by an effective strain of only five in the particle-containing alloy, compared to ten in the single-phase material. The mechanisms that contribute to this acceleration of the grain refinement process are discussed. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：2811 / 2822
页数：12
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