Content area

Abstract

In this study, experiments were carried out on AISI 304SS metal using cusp magnetic field (CMF)-assisted gas-tungsten arc welding (GTAW). The CMF was generated using four custom-made samarium cobalt (Sm2Co17) permanent magnets. Influence of CMF on the weld morphology, microstructure, elemental composition, and phase evolutions was evaluated using the optical microscope, field-emission scanning electron microscope (FESEM), and X-ray diffraction (XRD) technique. Tensile and Vickers hardness tests were conducted to evaluate the mechanical characteristics of the weld joints. After conducting tensile testing, the fracture mode of the tensile specimens was determined using FESEM. In CMF-assisted welds, the average width of weld bead was decreased by 13% and depth of penetration was increased by 37%. Also, the temperature of the workpiece, 6.5 mm away from the weld center line, showed a significant decrease for the same amount of heat input. The application of CMF resulted in the decrease of columnar dendrites and transformation of columnar dendrites to equiaxed dendrites in the weldment. The decrease in heat-affected zone thickness was also observed. The additional magnetic field caused a stirring action in the weld pool, which enhanced grain refinement and ferrite reduction. The tensile properties were improved by an average of 59%, and also, an increase in hardness at the heat-affected zone was observed in the CMF-assisted welds.

Details

Title
Influence of cusp magnetic field on the evolution of metallurgical and mechanical properties in GTAW of SS 304
Author
Durgaprasad, Kelli 1 ; Pal, Sukhomay 1 ; Das, Manas 1 

1  Indian Institute of Technology Guwahati, Department of Mechanical Engineering, Guwahati, India (GRID:grid.417972.e) (ISNI:0000 0001 1887 8311) 
Pages
5199-5214
Publication year
2023
Publication date
Jun 2023
Publisher
Springer Nature B.V.
ISSN
02683768
e-ISSN
14333015
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/s00170-023-11441-x
ProQuest document ID
2819139519
Copyright
© The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.