Comparison of conventional drilling and helical milling for hole making in Ti6Al4V titanium alloy under sustainable dry conditionSneharika Akula, Sadvidya N. Nayak, Gururaj Bolar and Vishwanath ManaguliManufacturing Rev., 8 (2021) 12DOI: https://doi.org/10.1051/mfreview/2021010