Unusual wavy weld pool boundary from dimensional analysis

Abstract

The geometry of a weld pool affects its solidification behavior. Here we show that the welding parameters and material properties responsible for the formation of unusual, wavy fusion boundaries can be identified from heat and fluid flow calculations and confirmed by independent experiments. These parameters and properties can be expressed by dimensionless numbers using the Buckingham π-theorem. The wavy boundary originates from the interaction of counter-rotating liquid metal loops at high Marangoni numbers. The Prandtl number affects the type of inflection.

Publication
Scripta Materialia, 60(68-71)
A. Arora, G. G. Roy and T. DebRoy, 2009. Unusual Wavy Weld Pool Boundary. Scripta Materialia, 60: 68-71.
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Amit Arora
Assistant Professor of Materials Science and Engineering

Amit Arora is Assistant Professor of Materials Science and 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 Metallurgical and Materials Transactions A, Journal of Materials Processing Technology, International Journal of Advanced Manufacturing Technology, Heat and Mass Transfer.