FABRICATION, CHARECTERIZATION AND DEVELOPMENT OF HIGH DAMPING MATERIALS FOR NAVAL APPLICATIONS

Raja Surya Nukala, J. Ajay

Abstract: Aluminum matrix composites are early inventions during 60’s. Presently these are used as railroad equipment and aerospace components. Their application has shown no further growth during the last decade due to lack of toughness. The noncompatibility between the matrix and the reinforcement and lack of good interface among these led to the reduced ductility levels. The limited solubility leads to the alloy formation passing solid solution strengthening while the un dissolved particles help achieving dispersion strengthening. Instead of taking ceramic particulates as reinforcements, metallic reinforcements were dispersed in aluminium matrix. Damping characteristics were calculated for the alloy and composites. Suitable heat treatment enhances the properties of the composite further. The expected mechanical properties will be higher than the regular alloys, which can be useful for various components in naval applications where high damping is required

Keywords: Dispersion Strengthening, Damping.

DOI: https://doi.org/10.15623/ijret.2015.0405077