Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates
Hybrid metal matrix composites (MMCs), recognized for their superior strength-to-weight ratios and synergistic property enhancements, are emerging as advanced materials capable of mitigating the inherent limitations observed in conventional monolithic composites. While traditional composites offer...
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Gruppo Italiano Frattura
2025-07-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://fracturae.com/index.php/fis/article/view/5473 |
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| author | Nagaraj S. Dhongade Vinod Kumar V. Meti I. G. Siddhalingeshwar G. U. Raju M. A. Umarfarooq N.R. Banapurmath Ashok M. Sajjan Vinayak S. Uppin Balbir Singh |
| author_facet | Nagaraj S. Dhongade Vinod Kumar V. Meti I. G. Siddhalingeshwar G. U. Raju M. A. Umarfarooq N.R. Banapurmath Ashok M. Sajjan Vinayak S. Uppin Balbir Singh |
| author_sort | Nagaraj S. Dhongade |
| collection | DOAJ |
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Hybrid metal matrix composites (MMCs), recognized for their superior strength-to-weight ratios and synergistic property enhancements, are emerging as advanced materials capable of mitigating the inherent limitations observed in conventional monolithic composites. While traditional composites offer structural benefits, their susceptibility to creep deformation and abrasive wear restricts their broader applicability. In sectors such as aerospace, automotive, and marine engineering, aluminum-based hybrid MMCs reinforced with ceramic particulates like titanium diboride (TiB2) and zirconium dioxide (ZrO₂) have garnered considerable interest due to their enhanced mechanical integrity and tribological performance. This investigation is an extension of previous work by authors AA7075 MMCs. This work systematically examines the influence of TiB2 (fixed at 5 wt%) coupled with incremental ZrO₂ reinforcement levels (2, 4, and 6 wt%) on the microstructure, mechanical strength, hardness, and wear resistance of AA7075 alloys fabricated via the stir casting process. The study aims to elucidate the compositional optimization of hybrid reinforcements to tailor material properties for high-performance applications. Microstructural analysis revealed an equiaxed grain structure with uniform reinforcement distribution, particularly in AA7075/5% TiB2/4% ZrO2 composition. The addition of reinforcements improved hardness up to 85.45%, increasing from 55 Hv (base alloy) to 102.40 Hv. And, also the yield strength increased from 107 MPa (base alloy) to 123 MPa, an increase of 15%, attributed to the improved particle detachment resistance. Introducing TiB2 and ZrO2 particles remarkably enhanced wear resistance with a wear rate of 155 µm with 10N load due to reinforcements that act as the lubricating agent between the metal matrix and the rotating disc. Among the compositions studied, AA7075/5% TiB2/4% ZrO2 exhibited superior performance, highlighting the potential of tailored hybrid composites for advanced mechanical and tribological applications in automotive, aerospace and marine industries.
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| format | Article |
| id | doaj-art-6a9832e9ca9c4d97b584bfca5de66be7 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-6a9832e9ca9c4d97b584bfca5de66be72025-08-26T06:52:15ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932025-07-01197410.3221/IGF-ESIS.74.01Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulatesNagaraj S. Dhongade0Vinod Kumar V. Meti1https://orcid.org/0000-0001-5692-9693I. G. Siddhalingeshwar2https://orcid.org/0000-0002-2361-596XG. U. Raju3M. A. Umarfarooq4https://orcid.org/0000-0002-9369-7913N.R. Banapurmath5https://orcid.org/0000-0002-1280-6234Ashok M. Sajjan6https://orcid.org/0000-0003-1251-8803Vinayak S. Uppin7https://orcid.org/0000-0001-9093-2757Balbir Singh8School of Mechanical Engineering, KLE Technological University, Hubballi, IndiaDepartment of Automation & Robotics, KLE Technological University, Hubballi, IndiaSchool of Mechanical Engineering, KLE Technological University, Hubballi, IndiaSchool of Mechanical Engineering, KLE Technological University, Hubballi, IndiaDepartment of Mechanical Engg. Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu, India. Center for Material Science, Department of Mechanical Engg. Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu, India.Centre of Excellence in Material Science, School of Mechanical Engineering, KLE Technological University, Hubballi-580031, IndiaCentre of Excellence in Material Science, School of Mechanical Engineering, KLE Technological University, Hubballi-580031, IndiaDepartment of Mechanical Engineering, SDM College of Engineering & Technology, Dharwad, Visvesvaraya Technological University, Belagavi, Karnataka, IndiaDepartment of Aeronautical and Automobile Engineering, Manipal Institute of Technology,Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India Hybrid metal matrix composites (MMCs), recognized for their superior strength-to-weight ratios and synergistic property enhancements, are emerging as advanced materials capable of mitigating the inherent limitations observed in conventional monolithic composites. While traditional composites offer structural benefits, their susceptibility to creep deformation and abrasive wear restricts their broader applicability. In sectors such as aerospace, automotive, and marine engineering, aluminum-based hybrid MMCs reinforced with ceramic particulates like titanium diboride (TiB2) and zirconium dioxide (ZrO₂) have garnered considerable interest due to their enhanced mechanical integrity and tribological performance. This investigation is an extension of previous work by authors AA7075 MMCs. This work systematically examines the influence of TiB2 (fixed at 5 wt%) coupled with incremental ZrO₂ reinforcement levels (2, 4, and 6 wt%) on the microstructure, mechanical strength, hardness, and wear resistance of AA7075 alloys fabricated via the stir casting process. The study aims to elucidate the compositional optimization of hybrid reinforcements to tailor material properties for high-performance applications. Microstructural analysis revealed an equiaxed grain structure with uniform reinforcement distribution, particularly in AA7075/5% TiB2/4% ZrO2 composition. The addition of reinforcements improved hardness up to 85.45%, increasing from 55 Hv (base alloy) to 102.40 Hv. And, also the yield strength increased from 107 MPa (base alloy) to 123 MPa, an increase of 15%, attributed to the improved particle detachment resistance. Introducing TiB2 and ZrO2 particles remarkably enhanced wear resistance with a wear rate of 155 µm with 10N load due to reinforcements that act as the lubricating agent between the metal matrix and the rotating disc. Among the compositions studied, AA7075/5% TiB2/4% ZrO2 exhibited superior performance, highlighting the potential of tailored hybrid composites for advanced mechanical and tribological applications in automotive, aerospace and marine industries. https://fracturae.com/index.php/fis/article/view/5473Metal matrix Hybrid compositesStir castingMicrostructural analysisMechanical propertiesTribological properties |
| spellingShingle | Nagaraj S. Dhongade Vinod Kumar V. Meti I. G. Siddhalingeshwar G. U. Raju M. A. Umarfarooq N.R. Banapurmath Ashok M. Sajjan Vinayak S. Uppin Balbir Singh Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates Fracture and Structural Integrity Metal matrix Hybrid composites Stir casting Microstructural analysis Mechanical properties Tribological properties |
| title | Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates |
| title_full | Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates |
| title_fullStr | Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates |
| title_full_unstemmed | Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates |
| title_short | Optimizing mechanical properties of AA7075 Metal Matrix Composites reinforced with TiB2 and ZrO2 particulates |
| title_sort | optimizing mechanical properties of aa7075 metal matrix composites reinforced with tib2 and zro2 particulates |
| topic | Metal matrix Hybrid composites Stir casting Microstructural analysis Mechanical properties Tribological properties |
| url | https://fracturae.com/index.php/fis/article/view/5473 |
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