Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization
Apparent limitations in toughness and ductility of ceramic reinforced aluminium matrix composites have prompted considerations of metallic reinforcements. In the present study, the structural characteristics, mechanical and wear behaviour of stir cast Al-Mg-Si alloy-based composites reinforced with...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-01-01
|
| Series: | Journal of Materials Research and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785417307007 |
| _version_ | 1818524624675143680 |
|---|---|
| author | Kenneth Kanayo Alaneme Adetomilola Victoria Fajemisin Nthabiseng Beauty Maledi |
| author_facet | Kenneth Kanayo Alaneme Adetomilola Victoria Fajemisin Nthabiseng Beauty Maledi |
| author_sort | Kenneth Kanayo Alaneme |
| collection | DOAJ |
| description | Apparent limitations in toughness and ductility of ceramic reinforced aluminium matrix composites have prompted considerations of metallic reinforcements. In the present study, the structural characteristics, mechanical and wear behaviour of stir cast Al-Mg-Si alloy-based composites reinforced with different weight percent of steel-, steel-graphite hybrid mix-, and SiC-particles were investigated. The results show that the hardness of the composites increased approximately by 11% with increase in steel particles from 4 to 8 wt.%. For the same range of steel concentration, the ultimate tensile strength also increased with increase in steel wt.%. These strength values were all higher than that of 8 wt.% reinforced SiC by a margin of 3.2–24%. The specific strength and fracture toughness equally followed the same trend with respect to steel concentration with strain to fracture, the exception where slight decrease (less than 4%) is observed. For these properties, the values were superior to the SiC reinforced composite and ascribed to improved grain refinement and interface bonding, and the inherent ductility of the steel particles. For the 8 wt.% hybrid reinforced composite compositions containing steel and graphite, all the mechanical properties decreased slightly with increase in graphite content and trailed the composite reinforced with 8 wt.% steel. However, the wear rates were lowest for the hybrid reinforcement mix of steel and graphite, followed by those containing only steel; while that reinforced with SiC had the highest wear susceptibility. Nonetheless, abrasive wear was the dominant wear mechanism observed in all the composites. Keywords: Aluminium-based composites, Metallic reinforcement, Steel particles, Graphite, Mechanical behaviour, Wear |
| first_indexed | 2024-12-11T05:59:27Z |
| format | Article |
| id | doaj.art-0f68fa6207e248a49df35564c8fe93cb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-11T05:59:27Z |
| publishDate | 2019-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0f68fa6207e248a49df35564c8fe93cb2022-12-22T01:18:32ZengElsevierJournal of Materials Research and Technology2238-78542019-01-0181670682Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterizationKenneth Kanayo Alaneme0Adetomilola Victoria Fajemisin1Nthabiseng Beauty Maledi2Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure PMB 704, Nigeria; African Materials Science and Engineering Network (AMSEN) – A Carnegie – IAS Regional Initiative in Science and Education Network, Johannesburg, South Africa; Corresponding author.Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure PMB 704, Nigeria; African Materials Science and Engineering Network (AMSEN) – A Carnegie – IAS Regional Initiative in Science and Education Network, Johannesburg, South AfricaSchool of Chemical and Metallurgical Engineering, University of Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South AfricaApparent limitations in toughness and ductility of ceramic reinforced aluminium matrix composites have prompted considerations of metallic reinforcements. In the present study, the structural characteristics, mechanical and wear behaviour of stir cast Al-Mg-Si alloy-based composites reinforced with different weight percent of steel-, steel-graphite hybrid mix-, and SiC-particles were investigated. The results show that the hardness of the composites increased approximately by 11% with increase in steel particles from 4 to 8 wt.%. For the same range of steel concentration, the ultimate tensile strength also increased with increase in steel wt.%. These strength values were all higher than that of 8 wt.% reinforced SiC by a margin of 3.2–24%. The specific strength and fracture toughness equally followed the same trend with respect to steel concentration with strain to fracture, the exception where slight decrease (less than 4%) is observed. For these properties, the values were superior to the SiC reinforced composite and ascribed to improved grain refinement and interface bonding, and the inherent ductility of the steel particles. For the 8 wt.% hybrid reinforced composite compositions containing steel and graphite, all the mechanical properties decreased slightly with increase in graphite content and trailed the composite reinforced with 8 wt.% steel. However, the wear rates were lowest for the hybrid reinforcement mix of steel and graphite, followed by those containing only steel; while that reinforced with SiC had the highest wear susceptibility. Nonetheless, abrasive wear was the dominant wear mechanism observed in all the composites. Keywords: Aluminium-based composites, Metallic reinforcement, Steel particles, Graphite, Mechanical behaviour, Wearhttp://www.sciencedirect.com/science/article/pii/S2238785417307007 |
| spellingShingle | Kenneth Kanayo Alaneme Adetomilola Victoria Fajemisin Nthabiseng Beauty Maledi Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization Journal of Materials Research and Technology |
| title | Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization |
| title_full | Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization |
| title_fullStr | Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization |
| title_full_unstemmed | Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization |
| title_short | Development of aluminium-based composites reinforced with steel and graphite particles: structural, mechanical and wear characterization |
| title_sort | development of aluminium based composites reinforced with steel and graphite particles structural mechanical and wear characterization |
| url | http://www.sciencedirect.com/science/article/pii/S2238785417307007 |
| work_keys_str_mv | AT kennethkanayoalaneme developmentofaluminiumbasedcompositesreinforcedwithsteelandgraphiteparticlesstructuralmechanicalandwearcharacterization AT adetomilolavictoriafajemisin developmentofaluminiumbasedcompositesreinforcedwithsteelandgraphiteparticlesstructuralmechanicalandwearcharacterization AT nthabisengbeautymaledi developmentofaluminiumbasedcompositesreinforcedwithsteelandgraphiteparticlesstructuralmechanicalandwearcharacterization |