Abstract
Shape memory alloys (SMAs) are the new generation functional material and being recognized as a smart or intelligent material. In this research, a novel Ni-rich NiTip shape memory alloy (SMA) reinforced magnesium matrix composites were prepared using a recent solid-state friction stir processing (FSP) technique. High speed steel was selected as tool material. A flat shouldered plain cylindrical tool pin profile was selected for experiment. The FSP was performed on a fixed value of 560 tool rpm, 100 mm/min traversing speed and 3° tool tilt. The particle distribution in processed zone was analyzed using optical micrography while micro-hardness were evaluated by Vickers indentation test. The results revealed that the FSP was successful in fabrication of surface composite on magnesium matrix. The processed zone indicates good bonding of reinforcement particles with the substrate. However, some accumulation of reinforcement was observed in the processed region. The micro-hardness of the reinforced zone shows significant improvement.
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