Abstract
In this study, plates of Inconel 600 superalloy were gas metal arc welded to investigate the effects of the welding process on the creep behavior of the welded samples and compare it to the creep behavior of samples in the as-received condition. Creep tests were performed at two temperatures (600 and 650 °C) with different stress levels. During the welding process, three distinctive microstructural zones are generated, i.e. welded material, heat affected zone, and base metal that may affect the properties of the welded joint. Microstructural, elemental analysis of samples was conducted using Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The experimental results show that creep rupture preferentially occurs in the heat-affected zone of the base metal at 4 mm from the fusion line and that the creep behavior of welded samples is different from that of the base metal. These results can be used in the design of structural components to assure their structural integrity.
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Acknowledgments
This work was supported by SENER-CONACYT México under the project: CEMIE-Geo-P18. The authors wish to thank the CIC of the Universidad Michoacana de San Nicolás de Hidalgo, special thanks to CONACYT-MEXICO for the scholarship provided to Lourdes Yareth Herrera-Chávez in her doctorate studies.
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Herrera-Chávez, L.Y., Ruiz, A., López-Morelos, V.H. et al. Microstructural and mechanical characterization of the effect of the welding process on creep behavior of welded joint and base metal specimens of Inconel 600. MRS Advances 5, 3003–3014 (2020). https://doi.org/10.1557/adv.2020.407
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DOI: https://doi.org/10.1557/adv.2020.407