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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11864
Title: Microstructural and mechanical properties assessment of the P91 A-TIG weld joints
Authors: Vidyarthy R.S.
Dwivedi D.K.
Published in: Journal of Manufacturing Processes
Abstract: In the current work, the effects of CeO2 and MoO3 based activating flux on heat input, weld bead geometry, and angular distortion during single pass A-TIG welding of the P91 steel were evaluated and compared with the conventional TIG welding. The A-TIG weldments developed using CeO2 and MoO3 based activating flux were also undergone for microstructure, microhardness, tensile test, and Charpy impact test study. It was observed that, the heat input increases in presence of activating fluxes at same welding input variables namely welding current, welding speed and arc length. An increase of 200% and 300% in joint penetration was obtained with CeO2 based flux and MoO3 based flux, respectively as compared to the conventional TIG weldments. Microstructure study reveals the presence of lath martensite, prior austenite grain boundaries along with MX (M: Nb, V, and X: C, N) and M23C6 (M: Fe, Mo, Mn, and Cr) type of precipitates in different zones of the weldments. Tensile strength of the A-TIG weldments was found better than that of the base metal. However, the Impact toughness of the A-TIG weldments was found to very low than the base metal. © 2017 The Society of Manufacturing Engineers
Citation: Journal of Manufacturing Processes (2018), 31(): 523-535
URI: https://doi.org/10.1016/j.jmapro.2017.12.012
http://repository.iitr.ac.in/handle/123456789/11864
Issue Date: 2018
Publisher: Elsevier Ltd
Keywords: A-TIG welding
Mechanical properties
Microstructure
P91 steel
Weld bead geometry
ISSN: 15266125
Author Scopus IDs: 57188881635
7004266679
Author Affiliations: Vidyarthy, R.S., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand 247667, India
Dwivedi, D.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand 247667, India
Funding Details: The authors gratefully acknowledge the financial support provided to this study by the Board of Research in Nuclear Sciences (BRNS) under the grant no. 36(2)/14/70/2014-BRNS/10416 , INDIA.
Corresponding Author: Vidyarthy, R.S.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology RoorkeeIndia; email: rsv88dme@iitr.ac.in
Appears in Collections:Journal Publications [ME]

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