Volume 5, Issue 2, March 2016, Page: 43-48
The Effect of Repair Welding Number on Microstructure of Hastelloy X Fabricated via TIG Process
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
Received: Nov. 22, 2015;       Accepted: Dec. 5, 2015;       Published: Mar. 21, 2016
DOI: 10.11648/j.ijmsa.20160502.12      View  2718      Downloads  68
Abstract
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.
Keywords
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
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Fude Wang, Mechanical property study on rapid additive layer manufacture Hastelloy X alloy by selective laser melting technology, The International Journal of Advanced Manufacturing Technology, 5-8, 2012, 545-551.
[2]
Jeremie Graneix, Jean Denis Beguin, Joël Alexis, Talal Masri, “Weldability of Superalloys Hastelloy X by Yb: YAG Laser", Advanced Materials Research, Vol 1099, pp. 61-70, Apr. 2015”.
[3]
J. C. Lippold, J. W. Sowards, G. M. Murray, B. T. Alexandrov, A. J. Ramirez, “Weld Solidification Cracking in Solid-Solution Strengthened Ni-Base Filler Metals”, 2008, pp. 147-170.
[4]
J. Matthew, S. Donachie, J. Donachie, “Superalloys, A Technical Guide”, 2nd ed., ASM International, USA, New York, 2002, pp. 192-265.
[5]
N. S. Stoloff, “Speciality Steels and Heat- Resistant Alloy”, Metals Handbook, 1ST ed., Vol. 1, ASM Handbook, 2005, pp. 1478-1549.
[6]
N. L. Richards and M. C. Chaturvedi, "Effect of minor elements on weldability of Nickle base superalloys", international Materials Reviews, Vol. 45, 2000.
[7]
Q. Wang, D. L. Sun, Y. Na, Y. Zhou, X. L. Han, J. Wang, "Effects of TIG Welding Parameters on Morphology and Mechanical Properties of Welded Joint of Ni-base Superalloy", Procedia engineering, 11th International Conference on the Mechanical Behavior of Materials (ICM11), 2011, 37-41.
[8]
Li. Zhang, S. L. Gobbi, K. H. Richter, “Autogenous Welding of Hastelloy X to Mar-M 247 by Laser”, J MaterPro Tech, 70, 1997, pp. 285-292.
[9]
M. Pang, G. Yu, H. H. Wang, C. Y. Zheng, “Microstructure Study of Laser Welding Cast Nickel-Based Super Alloy K418”, Journal of Materials Processing Technology, 207, 2008, pp. 271–275.
[10]
R. Sihotang; P. Sung-Sang; B. Eung-Ryul, Effects of heat input on microstructure of tungsten inert gas welding used hastelloy X, Volume 18, Issue S2 (May 2014), pp. S2-1074-S2-1080.
[11]
W. G. Kim, S. N. Yin, W. S. Ryu, J. H. Chang, S. J. Kim, "Tension and creep design stresses of the Hastelloy X alloy for high temperature gas cooled reactors", Materials science and engineering, 2008, p 495-497.
[12]
G. D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao, G. M. Reddy, J. K. Sarin Sundar, “Microstructure and Tensile Properties of Inconel 718 Pulsed Nd-YAG Laser Welds”, Journal of Materials Processing Technology, 167, 2005, pp. 73–82.
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