Direct observation of the behavior of grain boundaries during continuous dynamic recrystallization in an Al-4Mg-0.3Sc alloy

被引：75
作者：
Dougherty, LM
Robertson, IM
Vetrano, JS
机构：
[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
[2] Pacific NW Natl Lab, Richland, WA 99352 USA
来源：
ACTA MATERIALIA | 2003年 / 51卷 / 15期
关键词：
electron microscopy; aluminum alloy; dislocation dynamics; dynamic recrystallization;
D O I：
10.1016/S1359-6454(03)00262-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The micromechanisms operating during dynamic continuous recrystallization of an Al-4Mg-0.3Sc alloy have been studied in real time by reloading pre-deformed samples at temperature in situ in the transmission electron microscope. The processes responsible for the evolution of the microstructure include the migration and breakup of subgrain boundaries, the destruction of triple junctions, and large-scale volume rotations. These observations are considered in terms of the micromechanisms proposed previously to account for dynamic continuous recrystallization. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4367 / 4378
页数：12
相关论文
共 18 条
[1]   DEFORMATION CHARACTERISTICS OF AN AL-6CU-O.4ZR SUPERPLASTIC ALLOY [J].
BRICKNELL, RH ;
EDINGTON, JW .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1979, 10 (09) :1257-1263
[2]   Current issues in recrystallization: a review [J].
Doherty, RD ;
Hughes, DA ;
Humphreys, FJ ;
Jonas, JJ ;
Jensen, DJ ;
Kassner, ME ;
King, WE ;
McNelley, TR ;
McQueen, HJ ;
Rollett, AD .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 238 (02) :219-274
[3]  
DOUGHERTY LM, 2000, THESIS U ILLINOIS UR
[4]  
DOUGHERTY LM, 2002, UNPUB
[5]   MECHANISMS OF CONTINUOUS RECRYSTALLIZATION IN AN AL-ZR-SI ALLOY [J].
GUDMUNDSSON, H ;
BROOKS, D ;
WERT, JA .
ACTA METALLURGICA ET MATERIALIA, 1991, 39 (01) :19-35
[6]   MICROSTRUCTURAL EVOLUTION BY CONTINUOUS RECRYSTALLIZATION IN A SUPERPLASTIC AL-MG ALLOY [J].
HALES, SJ ;
MCNELLEY, TR .
ACTA METALLURGICA, 1988, 36 (05) :1229-1239
[7]   RECRYSTALLIZATION AND SUPERPLASTICITY AT 300-DEGREES-C IN AN ALUMINUM-MAGNESIUM ALLOY [J].
HALES, SJ ;
MCNELLEY, TR ;
MCQUEEN, HJ .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (05) :1037-1047
[8]  
HOAGLAND R, 2002, COMMUNICATION
[9]   TEM INSITU DEFORMATION STUDY OF THE INTERACTION OF LATTICE DISLOCATIONS WITH GRAIN-BOUNDARIES IN METALS [J].
LEE, TC ;
ROBERTSON, IM ;
BIRNBAUM, HK .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1990, 62 (01) :131-153
[10]   AN INSITU TRANSMISSION ELECTRON-MICROSCOPE DEFORMATION STUDY OF THE SLIP TRANSFER MECHANISMS IN METALS [J].
LEE, TC ;
ROBERTSON, IM ;
BIRNBAUM, HK .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (09) :2437-2447
12