The flow behavior and constitutive equation of (Al3Ti+Al2O3)/2024Al composites during hot compression

In this study, Al 3 Ti and nano-Al 2 O 3 co-reinforced aluminum matrix composites were prepared in situ autogenously using TiO 2 and Al alloys as raw materials. The high-temperature compression properties of the composites were tested at temperatures ranging from 300 to 500 °C and strain rates rangi...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-06, Vol.2478 (4), p.42003
Main Authors: Yang, L, Chao, Z L, Zhao, Z H, Jiang, L T, Chen, G Q, Wu, G H, Tong, H
Format: Article
Language:English
Subjects:
Aluminum base alloys
Aluminum matrix composites
Aluminum oxide
Compressive properties
Constitutive equations
Constitutive relationships
High temperature
Hot pressing
Particulate composites
Physics
Raw materials
Strain rate
Titanium aluminides
Titanium dioxide
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Summary:In this study, Al 3 Ti and nano-Al 2 O 3 co-reinforced aluminum matrix composites were prepared in situ autogenously using TiO 2 and Al alloys as raw materials. The high-temperature compression properties of the composites were tested at temperatures ranging from 300 to 500 °C and strain rates ranging from 0.0014 s −1 to 0.42 s −1 . Excellent high-temperature properties were demonstrated due to the presence of a large amount of Al 3 Ti and nano-Al 2 O 3 high-temperature phases in the composites. The peak compressive stress of (Al 3 Ti+Al 2 O 3 )/2024Al composites gradually decreases with increasing temperature and increases with increasing strain rate. The study also calculated the deformation activation energy of the composites and the intrinsic structure model during hot compression. This is a guideline for obtaining the material thermal processing conditions of new composites with excellent high-temperature properties.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2478/4/042003