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Lathabai, Sri
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Topics
Publications (9/9 displayed)
- 2019Fine Microstructure Control in Additively Manufactured Stainless Steel via Layerwise Rotation of The Scan Direction
- 2019Corrosion Studies of Additive Manufactured Alpha-Beta Ti Alloys
- 2019Corrosion Studies of Additively Manufactured Ti Alpha-Beta Alloys
- 2019Residual Stress in Additive Manufacture
- 2018Additive Manufacturing of Aluminium-based Alloys and Compositescitations
- 2014Welding and weldability of AZ31B by gas tungsten arc and laser beam welding processescitations
- 2013Tin dioxide-based ceramics as inert anodes for aluminium smelting: A laboratory studycitations
- 2013Effect of tool design on the microstructure and microhardness of friction stir processed 5005-H34 aluminium alloy
- 2011Friction stir blind riveting: A novel joining process for automotive light alloyscitations
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document
Residual Stress in Additive Manufacture
Abstract
Powder bed fusion (PBF) and Directed Energy Deposition (DED) are the two widely used Additive Manufacturing (AM) technologies. Energy sources such as laser or electron beam are used for melting of powder or wire following the geometric information contained in a Computer-Aided-Design (CAD) file. In these processes, components or parts are built in a layer-by-layer manner until a fully dense 3D structure is achieved. High thermal gradients and multiple thermal cycles are usually observed in DED and PBF processes, which combined with the characteristic thermal contraction of metallic materials following solidification and cooling result in residual stress and shape distortion. Understanding of stress evolution in these processes is therefore highly desired for stress management and process improvement. This paper presents the predicted stresses occurring during DED and PBF of Ti-6Al-4V builds. The results provide an understanding of the evolution of stress during and after completion of the builds. Managing stress raisers is also discussed.