New Investigations on the performance Enhancement of Cryogenic-LN2 assisted sustainable milling of titanium alloy

The low-temperature properties of the titanium alloy Ti17 affect the milling process. In order to better understand the various physical phenomena in the cryogenic cutting process, cryogenic impact tests and tensile tests of titanium alloy Ti17 were undertaken in this study. Based on the cryogenic performance of the material, experiments on dry milling and cryogenic milling with a liquid nitrogen jet were conducted. It was found that the strength was increased, and the toughness was decreased under cryogenic conditions. The milling force shows an increasing trend with the increase of cutting speed and feed rate under both cooling conditions. The milling forces of cryogenic conditions were higher than that of dry cutting, and the surface roughness under cryogenic conditions was also improved compared to dry cutting. This study highlights how cryogenic milling of Titanium Alloy Ti17 can improve surface roughness and mechanical strength, leading to extended tool life and reduced material waste, which contributes to sustainable manufacturing. Additionally, using cryogenic cooling minimizes the need for conventional cutting fluids, reducing environmental impact and enhancing process sustainability.