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Continuous welding of Cu-Ni dissimilar couple using $CO_{2}$ laser

Phanikumar, G and Dutta, P and Chattopadhyay, K (2005) Continuous welding of Cu-Ni dissimilar couple using $CO_{2}$ laser. In: Science and Technology of Welding and Joining, 10 (2). pp. 158-166.

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Abstract

The evolution of microstructure during continuous laser welding of dissimilar metals has been studied for a binary Cu - Ni couple. The effects of laser beam scan speed and laser power on the shape and size of the melt pool, the weldment - substrate interface, the composition profiles, and microstructures of the weldments have been investigated. It is shown that the melt pools exhibit a characteristic asymmetry in shape. The observed microstructure is characterised by the existence of compositional and microstructural variations leading to a banded appearance suggesting localised mixing. Distinct differences exist in the evolution of the microstructure in the copper and nickel sides of the weld pool. An attempt is made to explain some of the experimental observations using thermodynamic and thermal transport arguments.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Maney Publishing.
Keywords: Microstructure; Continuous Laser Welding; Dissimilar Metal Couples; CU-NI Couple; Laser Beam Scan Speed; Laser Power; Melt Pool; Composition Profiles
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 03 Feb 2006
Last Modified: 27 Aug 2008 11:43
URI: http://eprints.iisc.ernet.in/id/eprint/5289

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