Microstructures and Mechanical Properties of Multiphase-Reinforced In Situ Aluminum Matrix Composites

We investigated the microstructures and mechanical properties of multiphase-reinforced in situ aluminum matrix composites (AMCs) prepared with various combinations and contents of Li, Mg, Si, Cu, Zn, Sn, and Ni. The area fractions of the secondary phases in the as-cast AMCs ranged from 26% to 58%, a...

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Bibliographic Details
Published in:Metals and materials international 2019, 25(2), , pp.353-363
Main Authors: Kim, Ju-Hye, Jung, Jae-Gil, Baek, Eun-Ji, Choi, Yoon Suk, Euh, Kwangjun
Format: Article
Language:English
Subjects:
Aluminum
Aluminum base alloys
Aluminum matrix composites
Casting
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Compressive properties
Copper
Engineering Thermodynamics
Heat and Mass Transfer
Machines
Magnesium
Magnetic Materials
Magnetism
Manufacturing
Materials Science
Mechanical properties
Metallic Materials
Multiphase
Nickel
Organic chemistry
Particulate composites
Phases
Processes
Solid Mechanics
Strain
Tin
Zinc
재료공학
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Summary:We investigated the microstructures and mechanical properties of multiphase-reinforced in situ aluminum matrix composites (AMCs) prepared with various combinations and contents of Li, Mg, Si, Cu, Zn, Sn, and Ni. The area fractions of the secondary phases in the as-cast AMCs ranged from 26% to 58%, and the types of secondary phases depended on the alloy chemical compositions. The type and amount of secondary phases were more important than matrix strengthening in determining the alloy mechanical properties. Composite hardness and compressive stress increased while fracture strain decreased with increasing total area fraction of the secondary phases up to 40%. The formation of coarse primary and soft/heavy Sn-containing phases significantly deteriorated the alloy mechanical properties. Annealing also influenced the mechanical properties of the AMCs by changing the microstructures of the secondary phases and Al matrices.
ISSN:1598-9623
2005-4149
DOI:10.1007/s12540-018-0195-3