Effect of Heating Rate on Microstructural Evolution During Thermo-Mechanical Treatment Processing in AA2060 Alloy

被引：0
|
作者：
Li C. [1 ,2 ]
Huang G. [1 ]
Cao L. [1 ,3 ]
Cao Y. [1 ]
Lin L. [2 ]
机构：
[1] College of Materials Science and Engineering, Chongqing University, Chongqing
[2] Southwest Aluminum (Group) Co., Ltd., Chongqing
[3] Electron Microscopy Center, Chongqing University, Chongqing
来源：
Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 07期
基金：
中国国家自然科学基金;
关键词：
AA2060; alloy; Heating rate; Intermediate thermo-mechanical treatment process(ITMP); Microstructure evolution; Recrystallization;
D O I：
10.11896/cldb.21020008
中图分类号：
学科分类号：
摘要：
The samples of AA2060 alloy were two-stage homogenized, then cooled in the furnace, and subsequently deformed through the five pass rol-ling at 400 ℃, with 50% pre-rolled samples obtained finally. The 50% pre-rolled samples were tested by Gleeble-3800 thermal simulation machine at 450 ℃ at strain rate of 0.01 s-1, and the hot compression of samples were carried out with heating rate of 5 ℃/s, 10 ℃/s and 20 ℃/s, respectively. The microstructure evolution of precipitates and recrystallization under different heating rates were characterized by transmission electron microscopy (TEM), electron backscatter diffraction (EBSD) and backscattered electron image (BSE). According to the results, the precipitation quantity and size of the θ'(Al2Cu) phase increase with the heating rate decreasing, while the strain stress and strain har-dening rate decrease. Continuous recrystallization (CDRX), discontinuous recrystallization (DDRX), and sub-dynamic recrystallization (MDRX) occur du-ring hot deformation, in which CDRX and MDRX are the mainly recrystallization mechanisms during the ITMP process. Moreover, with the increase of heating rate, the proportion of CDRX and MDRX decreases. © 2022, Materials Review Magazine. All right reserved.
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