Novel study on Elastic recuperation of Titanium (grade 5) alloy during machining
2022-26-1167
05/26/2022
- Event
- Content
- Machining is the process of removing material from a workpiece, in the form of chips, to obtain the final part in its desired shape and size. Various aerospace materials such as Aluminum, Steel, Titanium etc. can be mainly shaped through machining process. Titanium alloys also find larger adoption in areas like Bio-medical and Automotive mainly because of their inherent high specific strength and consistent corrosion resistance. Machining Ti-6Al-4V (grade 5) has been difficult due to a number of its characteristics like poor conductivity of heat, strong and undesirable chemical reactivity with cutting tool materials at operating/ cutting temperature, it’s work hardening characteristics and very low modulus of elasticity. Due to low modulus of elasticity, the elastic recovery or recuperation of thin-walled Titanium grade 5 parts that occur after machining is an important topic/issue to be addressed since it has greater effect on the work piece surface quality, cutting tool wear and the process forces involved. This elastic recovery leads to bouncing away of work surface from cutting tool, further leading to rubbing of the cutting edge with the work surface rather than real cutting. In the present study attempts have been made to numerical model the machining process addressing the elastic recovery or work piece spring back and then validate the same with subsequent experimental observations by machining. While milling the thin-walled parts numerous cutting parameters like cutting speed, feed rate, depth of cut, cutting tool materials and cutting fluids were used and the resulting output variables like cutting force, tool wear, surface finish and the level of spring back were observed and discussed. It was observed that for sharp tool the spring back was less. Also, the extent to which spring back increases with increasing cutting speed has become lower.
- Citation
- Acharya, N., "Novel study on Elastic recuperation of Titanium (grade 5) alloy during machining," SAE Technical Paper 2022-26-1167, 2022, .