Abstract
Because of its outstanding strength-to-density ratios, corrosion resistance, and other superior properties, Ti-6Al-2Zr-1Mo-1 V titanium alloy (TA15) is widely employed in aeronautics and astronautics. TA15 is a typical difficult-to-cut material with low heat conductivity, a high cutting temperature, and an easy adhesion characteristic. When machining difficult-to-cut materials, cryogenic machining is an efficient way to lower the cutting temperature. There is, however, few research on machining TA15 under cryogenic cooling conditions. In this study, tensile tests were performed under different low-temperature cooling conditions. By analyzing the changes of material properties under different low temperatures, the machining mechanism of TA15 under cryogenic cooling conditions was revealed. Then, cutting experiments were carried out under three cooling conditions: dry, cutting fluid (wet), and liquid nitrogen internal cooling (cryogenic). The results show that under cryogenic conditions, TA15 can effectively reduce plasticity and adhesion. The cutting experiments also prove that machining TA15 under the cryogenic cooling condition can reduce the surface adhesion, improve the machining quality of the machined surface, and effectively reduce the generation of tool adhesion wear.
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Funding
This research is funded in part by National Key R&D Program of China (2019YFB2005400), Changjiang Scholar Program of the Chinese Ministry of Education (T2017030), and Top and Leading Talents of Dalian (2018RD05).
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Gan, Y., Wang, Y., Liu, K. et al. Machinability investigations in cryogenic internal cooling turning Ti-6Al-2Zr-1Mo-1 V titanium alloy. Int J Adv Manuf Technol 120, 7565–7574 (2022). https://doi.org/10.1007/s00170-022-09117-z
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DOI: https://doi.org/10.1007/s00170-022-09117-z