Experimental Investigation of the A-TIG Welding Process of Incoloy 800H

This work attempts to investigate the influence of different flux powders in the activated-TIG welding process of the Incoloy 800H super alloy. Three different fluxes (SiO 2 , ZnO, and 50% ZnO +50% SiO 2 ) were used and welded under the same conditions and process parameters. The oxide fluxes used w...

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Bibliographic Details
Published in:Materials and manufacturing processes 2015-09, Vol.30 (9), p.1154-1159
Main Authors: Kumar, Srirangan Arun, Sathiya, Paulraj
Format: Article
Language:English
Subjects:
Activated
Characteristic
Flux
Incoloy 800H
Metallurgical
Nano
Sensitization
TIG
Welding
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Summary:This work attempts to investigate the influence of different flux powders in the activated-TIG welding process of the Incoloy 800H super alloy. Three different fluxes (SiO 2 , ZnO, and 50% ZnO +50% SiO 2 ) were used and welded under the same conditions and process parameters. The oxide fluxes used were in the form of nanoparticle powders. The metallurgical characteristics and mechanical properties were analyzed, and it was found that the SiO 2 flux could increase the depth of penetration whereas a ZnO flux was detrimental to this effect. Although a SiO 2 flux increased the depth of penetration, it led to a sensitization issue in the grain boundary. The combination of the fluxes 50% ZnO +50% SiO 2 produced a moderate increase in the depth of penetration compared to ZnO flux-coated weldments, but revealed a dendritic structure in the weld region.
ISSN:1042-6914
1532-2475
DOI:10.1080/10426914.2015.1019092