Studies on Dissimilar Twin-Wire Weld-Deposition for Additive Manufacturing Applications

Somashekara, M A and Simhambhatla, S (2017) Studies on Dissimilar Twin-Wire Weld-Deposition for Additive Manufacturing Applications. Transactions of the Indian Institute of Metals, 70 (8). pp. 2123-2135. ISSN 0972-2815

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Abstract

Due to its high deposition rate, low cost and simple setup, weld-deposition based additive manufacturing is slowly evolving into a viable alternative for creating meso-scale applications. There is also an increasing demand for creating functionally gradient objects with varying properties. Gas metal arc welding based twin-wire weld-deposition presented here makes it possible to create functionally gradient objects with varying mechanical properties like hardness. This is achieved by using separate filler wires of different composition and controlling the proportion of each wire separately. The current work presents a proof of concept of the twin-wire weld-deposition and also the primary experiments carried out for understanding the effect of weld-deposition process parameter on bead geometry. Two filler wires viz., ER70S-6 and ER110S-G, the former having lower hardness than the latter, were used for the experimentation. The range of process parameter for different combinations of these filler wires was determined and the operating range of the same was identified. Subsequently, the criterion for adapting the twin-wire welding from joining to weld-deposition of a complete layer like thermal steady-state condition, effect of torch direction and effect of overlapping beads have also been studied.

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IITH Creators:
IITH CreatorsORCiD
Simhambhatla, Shttp://orcid.org/0000-0001-6015-7593
Item Type: Article
Uncontrolled Keywords: Welding, Deposition, Additive, Manufacturing, Gradient, Geometry
Subjects: Physics > Mechanical and aerospace
Others > Metallurgy Metallurgical Engineering
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 20 Jan 2017 04:52
Last Modified: 07 Sep 2017 06:48
URI: http://raiith.iith.ac.in/id/eprint/3004
Publisher URL: https://doi.org/10.1007/s12666-016-1032-3
OA policy: http://www.sherpa.ac.uk/romeo/issn/0972-2815/
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