The Effect of Repair Welding Number on Microstructure of Hastelloy X Fabricated via TIG Process
International Journal of Materials Science and Applications
Volume 5, Issue 2, March 2016, Pages: 43-48
Received: Nov. 22, 2015; Accepted: Dec. 5, 2015; Published: Mar. 21, 2016
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Mohammad Reza Abedi, Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
Hamed Sabet, Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
Hossein Razavi, Department of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
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The effect of repair welding number on microstructure of the hastelloy X fabricated via TIG process was investigated. The SEM, EDS and OM were used to determine mechanical properties and the microstructure of HAZ zone, respectively. Results showed that the grain size of base metal determined by OM and SEM was 64.11 μm with M6C and M23C6 carbides (6.16, 18.71 μm respectively). Also, using welding for three times caused increase of grain size (15%, 22%, 26% respectively) and the heat input made some carbides dissolve. The grain growth through HAZ zone venially affected the strength of alloy. The results of tensile test demonstrated that UTS increased by repair welding, 1%, 2% and 3% respectively. As the UTS of base metal was 727 MPa, the fracture phenomenon occurred. Furthermore, repair welding of mentioned alloy did not exceed more than three times.
GTAW, Hastelloy X, Microstructure, Carbides
To cite this article
Mohammad Reza Abedi, Hamed Sabet, Hossein Razavi, The Effect of Repair Welding Number on Microstructure of Hastelloy X Fabricated via TIG Process, International Journal of Materials Science and Applications. Vol. 5, No. 2, 2016, pp. 43-48. doi: 10.11648/j.ijmsa.20160502.12
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This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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