Mechanical Properties of Aluminium-Graphene Composite Synthesized by Powder Metallurgy and Hot Extrusion
| Autor: | S. J. Niteesh Kumar, M. R. Haseebuddin, Ramaiah Keshavamurthy, Praveennath G. Koppad |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Graphene Metallurgy Composite number chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences law.invention chemistry Aluminium law Powder metallurgy 0103 physical sciences Ultimate tensile strength Extrusion 0210 nano-technology Strengthening mechanisms of materials |
| Zdroj: | Transactions of the Indian Institute of Metals. 70:605-613 |
| ISSN: | 0975-1645 0972-2815 |
| DOI: | 10.1007/s12666-017-1070-5 |
| Popis: | The present work focuses on the development of multilayer graphene reinforced aluminium metal matrix composites by powder metallurgy followed by hot extrusion. Microstructure, grain size analysis and mechanical properties of hot extruded unreinforced aluminium and graphene reinforced aluminium composites are presented here. Microstructure shows uniform distribution of graphene throughout the matrix. Experimental results reveal significant increase in hardness as well as tensile strength of composite as compared to unreinforced aluminium. The improvements in properties are attributed to uniformly dispersed graphene sheets, an excellent interfacial bonding between graphene and aluminium matrix and grain refinement caused by the addition of graphene. Further, the strengthening mechanisms involved in the aluminum-graphene composite have been discussed. The fracture studies show the transition of ductile fracture in case of pure aluminium to brittle fracture in case of aluminium-graphene composites. |
| Databáze: | OpenAIRE |
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