Abstract
Cryogenic cooling is an efficient technology to facilitate the machining process of difficult-to-cut materials. Performing this process with nontoxic biocompatible liquid nitrogen is an eco-friendly operation which has recently received much attention due to its promising advantages. In the present work, a comparative study has been performed on the machining process of Ti6Al4V alloy using dry and cryogenic cooling approaches. So, the effect of machining parameters (cutting speed, feed rate, and depth of cut) is investigated on the process temperature and the surface integrity features such as surface roughness, microhardness, and grain size. The results revealed that the cryogenic technology decreases the cutting region temperature by about 30% which means applying less thermal loads on the machining samples. Also, among the process parameters, the feed rate has the greatest effect and the cutting speed has the least effect on the machining temperature. Based on the results, the cryogenic cooling has a successful effect on improving surface quality. It was also discovered that the cryogenic machining increases microhardness and decreases grain size compared to dry machining.
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Fallah, M.M., Jafarian, F. Cryogenic and Dry Machining of Ti6Al4V Alloy for Evaluation of Microhardness, Thermal Loads, Microstructure, and Surface Quality. J. of Materi Eng and Perform 32, 5895–5905 (2023). https://doi.org/10.1007/s11665-022-07512-x
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DOI: https://doi.org/10.1007/s11665-022-07512-x