Abstract
This study explores the impact of TiB2 nanoparticles on the microstructure, microhardness, and tensile properties of AA-2014 surface composite manufactured through Friction Stir Processing (FSP). A series of experiments were conducted with varying FSP parameters, and the findings were compared with the base metal. Microstructure studies revealed optimal bonding between TiB2 and the AA-2014 substrate at 1200 rpm, surpassing results from 900 and 1600 rpm. However, microstructural analysis unveiled agglomeration of particles and void formation on the composite surface. Microhardness values indicated a substantial increase from 88 HV (AA-2014) to 138 HV (AA-2014/3%TiB2 @1200rpm), attributed to the presence of TiB2 nanoparticles and FSP-induced modifications. Ultimate Tensile Strength (UTS) values exhibited a noteworthy improvement from 290 MPa (AA-2014) to 465 MPa (AA-2014/3%TiB2 @1200rpm), emphasizing the positive influence of uniform TiB2 dispersion achieved during FSP. The study underscores the effectiveness of TiB2 reinforcement and FSP in enhancing the mechanical properties of AA-2014 surface composite, despite observed microstructural features.
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