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Advances in Materials Research Volume 5, Number 4, December 2016 , pages 263-277 DOI: https://doi.org/10.12989/amr.2016.5.4.263 |
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Mechanical properties of Al/Al2O3 and Al/B4C composites |
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Vinod K. Pandey, Badri P. Patel and Siddalingappa Guruprasad
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| Abstract | ||
| Mechanical properties of Al/Al2O3 and Al/B4C composites prepared through powder metallurgy are estimated up to 50% Al2O3 and 35% B4C weight fractions using micromechanics models and experiments. The experimental Young\'s modulus up to 0.40 weight fraction of ceramic is found to lie closely between Ravichandran\'s/Hashin-Shtrikman lower/upper bounds, and close to self consistent method/Miller and Lannutti method/modified rule of mixture/fuzzy logic method single value predictions. Measured Poisson\'s ratio lies between rule of mixture/Ravichandran lower and upper bound/modified Ravichandran upper bounds. Experimental Charpy energy lies between Hopkin-chamis method/equivalent charpy energy/Ravichandran lower limit up to 20%, and close to the reciprocal rule of mixture for higher Al2O3 content. Rockwell hardness (RB) and Micro-hardness of Al/Al2O3 are closer to modified rule of mixture predictions. | ||
| Key Words | ||
| mechanical properties; hardness; micro-mechanics; powder processing; functionally graded material | ||
| Address | ||
| Vinod K. Pandey: Research and Development Establishment (Engineers), Pune, India Badri P. Patel: Applied Mechanics Department, Indian Institute of Technology Delhi, New Delhi, India Siddalingappa Guruprasad: DRDO HQ, New Delhi, India | ||
