期刊
MATERIALS
卷 15, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ma15031206
关键词
pure Al; caliber rolling; microstructure; texture; mechanical property
类别
资金
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of Hebei Province [C20190505]
- Hebei Provincial Key Research Special Project Development and Application of Key Preparation Technology of High Strength and ToughnessMagnesium Alloys for AutomobileWheel Hub from Hebei Development and Reform Commission
- Hebei Provincial Department of Finance, China
- National Natural Science Foundation of China [51701060]
This study presents the microstructure and mechanical properties of pure aluminum fabricated by multi-pass caliber rolling. With increasing rolling passes, the temperature, stress, and strain gradually increased, while the maximum rolling force decreased. Dynamic recrystallization resulted in grain refinement and increased dislocation density. The texture of the material also changed during the rolling process.
The paper presents the microstructure and mechanical property of pure aluminum (Al) fabricated by multi-pass caliber rolling at room temperature. The finite element modeling (FEM) simulation was performed to explore the changes in rolling force, effective stress and strain, and temperature under various rolling passes. As the number of rolling passes increased, the overall temperature, effective stress, and strain gradually increased, while the maximum rolling force decreased. In addition, due to the dynamic recrystallization (DRX), the average grain size reduced from 1 mm to 14 mu m with the increase in rolling passes. The dislocation density increased and it gradually evolved into the high-angle grain boundaries (HAGBs). Moreover, the initial cubic texture rotated to the brass component and finally changed to a mixture of Cube and Brass types. The highest tensile yield strength (TYS), ultimate tensile strength (UTS) and elongation (El.) of caliber rolled pure Al (116 MPa, 135 MPa, and 17%, respectively) can be achieved after 13 rolling passes, which mainly attributed to grain refinement.
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