期刊
MATERIALS CHARACTERIZATION
卷 178, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2021.111202
关键词
Aluminum alloys; Friction-stir welding; Weld thermal cycle; Electron backscatter diffraction (EBSD); Microstructure; Texture
类别
资金
- Russian Science Foundation [19-49-02001]
- Russian Science Foundation [19-49-02001] Funding Source: Russian Science Foundation
This study investigates the relationship between thermal cycle generated during friction-stir welding of a 6061 aluminum alloy and resulting grain structure evolution. The grain structure evolution is mainly controlled by continuous recrystallization, while at elevated temperatures, competitive recovery hinders recrystallization kinetics.
In this work, the relationship between the thermal cycle generated during friction-stir welding (FSW) of a 6061 aluminum alloy and the resulting grain structure was studied. To this end, FSW was conducted at measured welding temperatures from 340 to 450 degrees C and cooling rates from 15 to 70 degrees C/s, and the evolved microstructures were systematically examined using electron backscatter diffraction (EBSD). In all cases, the evolution of the grain structure was governed by continuous recrystallization. At elevated temperatures, however, a competitive recovery retarded the recrystallization kinetics.
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