Investigations on mechanical behavior of processed MMCs of Al6082 and reinforcement particles B4C by powder metallurgy technique

Abstract

In this current research, Al6082 is a base material which is incorporated into the boron carbide (B4C) strengthens particle. The metal matrix composites (MMCs) of Al6082 and B4C were produced by the powder metallurgy (PM) technique. Those chosen fractions of B4C with weight ratio are 0, 3, 6, and 9 % and these mixed powders are initially treated with ball milling and compaction for cold process with maintaining parameters are 80 bar and 9.81 kN. Then sintering process was approached with theses MMCs specimens to produce the magnesium boron carbide composites. During the process, sintering temperature was maintained at 1200 °C in the tubular furnace. The following characteristics compressive, hardness and impact properties were investigated on the magnesium boron carbide composites samples. From the results, the increasing of boron carbide at 9 % wt. attained superior mechanical properties. Finally, the un-reinforced magnesium alloy was attained lesser mechanical characteristics when compared to the boron reinforced magnesium composites. The well blended between the boron carbide and magnesium alloy creates intermetallic bonding efficiently and homogeneous dispersion was generated.