Micromechanical and Nanoscratch Behavior of SiCp Dispersed Metal Matrix Composites
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Micromechanical response of silicon carbide particle dispersed Al/Mg/Ti/Cu composite, synthesized by powder metallurgy technique was investigated. A correlation between their microhardness and nanomechanical properties at submicron length scale was established. Hardening effect of SiC particles on the hardness, elastic modulus, recovery index, and plastic energy of the matrices was prominent and may be due to the interactions between geometrically necessary and statistically stored dislocations along with their impediment with dispersoids-matrix interface. The elastic recovery obtained from nanoscratch measurement was also correlated with the recovery parameter, which was derived from the nanoindentation of the composite compacts.
Keywordshardness metal matrix composites nanoindentation powder metallurgy scratch sintering
The authors express their heartiest gratitude toward Prof. (Dr.) Partha Protim Chattopadhyay and Prof. (Dr.) Amitava Basu Mallick, Department of Metallurgy and Materials Engineering, Indian Institute of Engineering Science and Technology, Shibpur for mentoring the work. The authors are also thankful to Dr. Malay Kundu, Scientific Officer, the School of Materials Science and Engineering, Indian Institute of Engineering Science and Technology, Shibpur for assistance during SEM investigations.
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