4. Conclusions

From the experimental results, it is concluded that cryogenic machining is recommended for Ti-6Al-4V. Results are satisfying sustainability for eco-friendly impact on the environment, reducing tooling and energy cost. Efforts can be made to switch from conventional machining to cryogenic machining which would be beneficial in reducing machining costs, health risks along with fine surface surface.

The minimum value of surface finish can be obtained by the cryogenic machining using the coated carbide cutting tools. The cutting tool will not be damaged by cryogenic cooling ensuring both the sustainability and cost saving. Comparison of cutting power, cutting time, electricity cost, coolant cost, machine operating cost and material removal rate (Figure 7) for nearly identical response of surface finish shows that the cryogenic machining is more sustainable than others.

The results of tool life describe that cutting tool will survive for longer time in cryogenic cutting conditions than dry and conventional, resulting low cost of tool for the machining processes. Similarly, the cost evaluation resulted in low machining cost for cryogenic cooling as compared to dry and conventional. Cryogenic machining is more affordable and economic as there is no cost of pumping coolant, very low cost for cutting tool inserts and labour.

Cutting tool inserts were found damaged in dry machining, whereas very low wear was found in conventional, and no wear was found in cryogenic machining.

Figure 7. Average response values calculated for nearly identical surface finish.

Sustainable Machining for Titanium Alloy Ti-6Al-4V DOI: http://dx.doi.org/10.5772/intechopen.82344

Material removal rate: the material removal rate is 81.12% more for cryogenic

From the experimental results, it is concluded that cryogenic machining is recommended for Ti-6Al-4V. Results are satisfying sustainability for eco-friendly impact on the environment, reducing tooling and energy cost. Efforts can be made to switch from conventional machining to cryogenic machining which would be beneficial in reducing machining costs, health risks along with fine surface surface. The minimum value of surface finish can be obtained by the cryogenic machining using the coated carbide cutting tools. The cutting tool will not be damaged by cryogenic cooling ensuring both the sustainability and cost saving. Comparison of cutting power, cutting time, electricity cost, coolant cost, machine operating cost and material removal rate (Figure 7) for nearly identical response of surface finish

The results of tool life describe that cutting tool will survive for longer time in cryogenic cutting conditions than dry and conventional, resulting low cost of tool for the machining processes. Similarly, the cost evaluation resulted in low machining cost for cryogenic cooling as compared to dry and conventional. Cryogenic machining is more affordable and economic as there is no cost of pumping coolant,

Cutting tool inserts were found damaged in dry machining, whereas very low wear was found in conventional, and no wear was found in cryogenic machining.

shows that the cryogenic machining is more sustainable than others.

very low cost for cutting tool inserts and labour.

Average response values calculated for nearly identical surface finish.

that the waste in the form of damaged tools is reduced.

Titanium Alloys - Novel Aspects of Their Manufacturing and Processing

Tool life: cutting tool's life is 5.2 times more for cryogenic cooling which indicates

than dry machining.

4. Conclusions

Figure 7.

116

The coolant used in conventional machining has its adverse effects on worker's health and environment, while the nitrogen gas is harmless. The tool wear rates are also high for dry and conventional. Summarizing all findings, it can be stated that cryogenic machining supports the sustainable machining.
