EBSD study of a hot deformed austenitic stainless steel

被引：220
作者：
Mirzadeh, H. [1 ,2 ]
Cabrera, J. M. [2 ,3 ]
Najafizadeh, A. [1 ]
Calvillo, P. R. [2 ,3 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
[2] Univ Politecn Cataluna, ETSEIB, Dept Ciencia Mat & Ingn Met, E-08028 Barcelona, Spain
[3] Fundacio CTM Ctr Tecnol, Manresa 08242, Spain
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 538卷
关键词：
Hot working; Electron back-scattered diffraction; JMAK analysis; Dynamic recrystallization; Sigma 3 annealing twin boundary; Grain average misorientation; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURAL EVOLUTION; METADYNAMIC RECRYSTALLIZATION; MICROALLOYED STEELS; TEXTURE DEVELOPMENT; WARM DEFORMATION; ANNEALING TWINS; SINGLE-CRYSTALS; BEHAVIOR; MECHANISMS;
D O I：
10.1016/j.msea.2012.01.037
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructural evolution of a 304 H austenitic stainless steel subjected to hot compression was studied by the electron backscattered diffraction (EBSD) technique. Detailed data about the boundaries, coincidence site lattice (CSL) relationships and grain size were acquired from the orientation imaging microscopy (OIM) maps. It was found that twins play an important role in the nucleation and growth of dynamic recrystallization (DRX) during hot deformation. Moreover, the conventional discontinuous DRX (DDRX) was found to be in charge of grain refinement reached under the testing conditions studied. Furthermore, the recrystallized fraction (X) was determined from the grain average misorientation (GAM) distribution based on the threshold value of 1.55 degrees. The frequency of high angle boundaries showed a direct relationship with X. A time exponent of 1.11 was determined from Avrami analysis, which was related to the observed single-peak behavior in the stress-strain flow curves. (C) 2012 Elsevier B.V. All rights reserved.
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收藏
页码：236 / 245
页数：10
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