Additive Manufacuring

Additive manufacturing of titanium alloy Ti-6Al-4 V has significantly increased over the past few years, primarily due to its broad application over the conventional manufacturing process for complex and near net shape production. However, difficulties arise while printing complex and huge structures and therefore, the components need a suitable joining process. We study the feasibility of friction stir welding of Ti-6Al-4 V plates made by electron beam melting, performing both microstructural and mechanical analysis. Microstructures for all the welds reveal lamellar (α+β) phase and very fine equiaxed α grain with the prior β phase at grain boundaries in the stirred zone. Microhardness at different depths of the joint is measured and the strength of the joint is determined using a tensile test. The results obtained prove the feasibility of the process and provide the necessary processing conditions.

Amit Arora
Associate Professor of Materials Engineering

Amit Arora is Associate Professor of Materials Engineering at Indian Institute of Technology Gandhinagar. He leads the Advanced Materials Processing Research Group at IIT Gandhinagar which works in the area of numerical modeling of welding and joining processes, additive manufacturing processes, and friction stir welding and processing including tool wear during FSW, numerical modeling of dissimilar FSW, and mechanical and electrochemical characterization of friction stir surface composites. Recent works have been published in journals such as Wear, Metallurgical and Materials Transactions A, Journal of Materials Processing Technology, International Journal of Advanced Manufacturing Technology, Heat and Mass Transfer.