Proceedings of the
9th International Conference of Nanomanufacturing (nanoMan2024)
December 1 – 4, 2024, Singapore
An Investigation of Surface Uniformity, Chip Formation and Microhardness of Magnetic Field Assisted Diamond Turning of Titanium Alloys
State Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong Special Administrative Region.
ABSTRACT
Titanium alloys, renowned for their strength-to-weight ratio and biocompatibility, are significant in aerospace, biomedical, and automotive sectors. However, their low thermal conductivity and elastic modulus pose machining challenges in ultraprecision machining (UPM). This study explores Magnetic Field Assisted Diamond Turning (MFDT) to address this, aiming to enhance the machinability of Ti-6Al-4V alloy machining in ultra-precision machining (UPM). The results suggest that continuous and narrow chips are formed in applying the magnetic field, while under non-magnetic field conditions, the chips present discontinuous and cracks. Surface roughness analysis revealed the localized roughness area decreased to a consistently even finish at the surface center under magnetic field influence, indicating of improved surface uniformity. Finally, MFDT produced a consistently stable microhardness distribution from the workpiece edge to the center, unlike non-magnetic field conditions, emphasizing its impact on uniform material properties of a machined surface. This study contributes to improving the machining quality of titanium alloys by MFDT.
Keywords: Magnetic field assisted diamond turning, Titanium alloys, Surface quality, Ultra-precision machining.
