Effects of magnetic field on microstructures and mechanical properties of titanium alloys in ultra-precision diamond turning

Abstract

In this study, a magnetic field was superimposed in single point diamond turning (SPDT) of titanium alloys, aimed at enhancing the mechanical and microstructural properties of machined titanium alloy surface. The experimental results showed that the grain size decreased under an influence of magnetic field, showing grain refinements and reductions of grain pile up near grain boundaries on the machined surface, which grain pile up in machining of titanium alloys denotes as coarse colonies of alpha laths near grain boundary on the machined surface. Also, microhardness and ductility of the machined surfaces were enhanced simultaneously by using a magnetic field in SPDT. The study proposes a novel machining technology to enhance mechanical properties and the grain structure of machined titanium alloys in SPDT.