Grinding investigations of Ti-6Al-4V parts produced using direct metal laser sintering technology Online publication date: Sat, 12-Dec-2015
by Anil K. Srivastava; Radu Pavel
International Journal of Mechatronics and Manufacturing Systems (IJMMS), Vol. 8, No. 5/6, 2015
Abstract: The effect of various grinding parameters on the surface integrity of titanium (Ti-6Al-4V) alloy specimens produced using direct metal laser sintering (DMLS®) process have been studied. The goal has been to identify the safe grinding parameters that would result in ground surfaces free of defects such as micro-cracks, discoloration, and/or burn marks which occur due to localised high heat generated during grinding. The residual stresses have been used to quantify the effect of grinding parameters on the ground surface. The experimental results show that the grinding parameters within the range of 10.2 m/s-20.3 m/s wheel speed, 12.2 m/min-14.7 m/min feed rate, and a depth of cut smaller than 0.025 mm, with the condition that any of the combination of these parameters leading to an equivalent chip thickness lower than 0.254 µm, and a specific material removal rate lower than 4.3 mm3/s/mm will provide compressive residual stresses and can be used as safe grinding parameters.
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