Abstract:
The dataset presented here shows the microstructure and mechanical properties of secondary
(recycled) cast aluminum-silicon (Al-Si) piston alloys processed through severe plastic
deformation technique, known as high-pressure torsion (HPT). The HPT processing was
undertaken for ¼, ½, 1 and 10 turns of the lower anvil (rotating at constant speed of 1 rpm) while
the upper anvil maintained at a normal pressure of 3.0 GPa. The data on microstructural evolution
obtained at the central region and edge of the circular (disk) HPT sample were obtained using
optical and scanning electron microscopy and these data are presented here. The data on the
analysis of the particle shape, sizes and distribution from the micrographs using ImageJ software
are also presented. Data on mechanical properties characterized using Vickers microhardness
measurement across the surface of HPT sample are also shown. Pictures depicting the
microhardness measurement scheme, high-pressure torsion facility and sample nomenclature are
presented.
