Coupled effects of vortex tube hybrid cooling with minimal quantity reinforced nanoparticle lubricants in turning NiTi alloys
- 22 Downloads
Phase transformation of nickel-titanium (NiTi) alloys due to temperature rise during machining process can deliberately deliver poor machinability. Hence, this study investigated the hybrid cooling and lubricating effects of nano-minimum quantity lubricant (NanoMQL) with vortex chilled air of NiTi machining. NanoMQL with vortex chilled air depicted a consistently low tool wear of 0.14 mm as compared to other conditions despite experiencing similar cutting duration, particularly for a lower speed of 12.5 m/min. Likewise, the hybrid cooling method had a profound effect towards tool wear resistant when cutting speed was doubled. A reduced cutting force of 108–185 N and a 15–18% improvement on surface roughness was also observed under the hybrid coolant and lubrication. Conclusively, a substantial improvement towards machinability of NiTi alloys was evidenced in this study.
KeywordsNiTi shape memory alloys Wear testing Nano MQL Vortex tube chilled air cooling
We acknowledged the support from SECO Tools (Malaysia) Sdn Bhd on the cutting inserts for machinability evaluation purposes.
The financial support was from Malaysian Ministry of Education through Fundamental Research Grant Scheme (FRGS) no: FRGS/1/2015/TK03/UNIMAP/02/6 (UniMAP Project Code: 9003-00538).
- 1.Markopoulos AP, Pressas IS, Manolakos DE (2015) A review on the machining of nickel-titanium shape-memory alloy. Rev. Adv. Mater. Sci. 42(July):28–35Google Scholar
- 23.Z. Zainal Abidin, P. Tarisai Mativenga, and G. Harrison 2019, “Chilled air system and size effect in micro-milling of nickel−titanium shape memory alloys,”. Int. J. Precis. Eng. Manuf. Technol. Google Scholar