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- Title
Development and characterization of hybrid aluminium matrix composites through stir-squeeze casting using distinct reinforcements for structural applications.
- Authors
Ali, Muhammad Asad; Mufti, Nadeem Ahmad; Ishfaq, Kashif; Naveed, Rakhshanda; Saleem, Muhammad Qaiser; Qureshi, Asif Mahmood
- Abstract
In the modern era, the demand for lightweight and high-strength aluminium matrix composites (AMCs) has significantly grown as a result of their structural applications in various sectors. The distinctive characteristics of AMCs are intricately impacted by variables like the type and weight percentage (wt.%) of reinforcement, the selection of processing techniques, and the matrix employed. Fabricating hybrid AMCs poses several challenges, including achieving desired geometrical shapes, homogeneous mixing of reinforcements, addressing porosity, and ensuring strong interfacial bonding of reinforcement-matrix interfaces. Stir-squeeze casting has emerged as a non-traditional casting technique with the potential to address these challenges effectively. This study intends to look into the impacts of the distinct reinforcement particles (Al2O3, SiC, Si3N4, and BN) with varying wt.% on the development of different configurations of hybrid AMCs based on AA2024. The key properties that have been examined include porosity, ultimate tensile strength (UTS), elongation percentage (EL%), hardness, and impact energy of developed hybrid AMCs. The results reveal that UTS (235.6 to 377.8 MPa) and hardness (51.5 to 85.1 HRB) significantly increased with the addition of reinforcement particles, while EL% (11.6 to 7.9%) and impact energy (6.62 to 5.61 J) decreased. AA2024/2%Al2O3/2%SiC/2%Si3N4/2%BN outperformed in terms of UTS and hardness and gave 60.36% and 65.24%, respectively; however, the porosity, EL%, and impact energy have been compromised from the matrix material (AA2024) by 1.61%, 31.89%, and 15.26%, respectively. Fractography analysis of UTS and Charpy impact fractured samples depicts that a dimple fracture has been observed for the AA2024 without any reinforcement. However, with the inclusion of particles for reinforcing (Al2O3, SiC), the fabricated AMC AA2024/2%Al2O3/2%SiC provided the cleavage fracture, while transgranular cleavage fractures have been observed in the fractured surfaces of the third and fourth configurations (AA2024/2%Al2O3/2%SiC/2%Si3N4, AA2024/2%Al2O3/2%SiC/2%BN). Moreover, the brittle fracture has been depicted in the broken sample of AA2024/2%Al2O3/2%SiC/2%Si3N4/2%BN.
- Publication
International Journal of Advanced Manufacturing Technology, 2024, Vol 133, Issue 11/12, p5897
- ISSN
0268-3768
- Publication type
Article
- DOI
10.1007/s00170-024-14102-9