Study and Optimisation of Process Parameter in Turning Of EN 45 - Spring Steel Material Under Dry And MQL ConditionsKosaraju Satynarayana, Kumkuma Rajkiran and Kalemula Sai KiranE3S Web Conf., 184 (2020) 01051DOI: https://doi.org/10.1051/e3sconf/202018401051