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Improvement in Mechanical Behavior of Expulsion with Heat treated Thermite Welded Rail Steel

Authors: S.Rajanna, H.K.Shivanand, Akash Deep B.N


Thermite welding is mainly used in world. The reasons why the thermite welding method is widely used are that the equipment has good mobility and total working time of that is shorter than that of the enclosed arc welding method on site. Moreover, the operating skill, which required for thermite welding, is less than that of for enclosed arc welding. In the present research work, heat treatment and combined 'expulsion and heat treatment' techniques were used improve the mechanical properties and weldment structure. The specimens were cut in the transverse direction from expulsion with Heat treated and heat treated Thermite Welded rails. Specimens were prepared according to AWS standard and subjected to tensile test, Impact test and hardness and their results were tabulated. Microstructural analysis was carried out with the help of SEM. Then analyze to effect of heat treated and 'expulsion with heat treated' with the properties of their thermite welded rails. Compare the mechanical and microstructural properties of thermite welded rails between heat expulsion with heat treated and heat treated. Mechanical and microstructural response expulsion with heat treated thermite welded rail is higher value as compared to heat treatment.

Keywords: Mechanical, Heat Treatment, expulsion, Weldment

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[1] Bush, R. F., "Rail Failure Statistics," A.R.E.A. Proceedings, Vol. 73, Bulletin 638, 1972.
[2] Ishida.M., Miura.S, Kono, A.: Track dynamic Model and its analytical results, RTRI REPORT 11-12, February 1997 (in Japanese)
[3] M.K. Mukhopadhyay, An investigation in to Rail failure, IIM Metal News, Volume 10, P 22-23, June 2007.
[4] Y.Li, G. Kang, C. Wang, P. Dou and J.Wang. Vertical short-crock behavior and its application in rolling contact fatigue. Int. J. Fatigue. Vol.28 (7), 2006, pp. 804-811.
[5] Michael W. Brown, Steven Hemsworth, Sik Lun Wong, Sirius, Rolling contact fatigue crack growth in rail steel. The university of Sheffield (U.K), PP. 29-31, 1996.
[6] P.J. Webster, G. Mills, X.D. Wang, W.P. Kang and T.M. Holden, Residual stresses in alumino-thermic welded rails. J. Strain Analysis. Vol. 32(6), 1997, pp. 389-400
[7] Nenad Ilic, Milan T. Jovanovic, Misa Todorovid, Milan Trtanj, and Petar Saponjic, Micro structural and Mechanical Characterization of Postweld Heat- Treated Thermite Weld in Rails, Department of Materials Science, Institute of Nuclear Sciences, Yugoslavia, PP. 242- 250, 1999.
[8] C.P.Lonsdale, Thermite rail welding: history, process developments, current practices and outlook for the 21st century, metallurgical engineer conrail technical services laboratory altoona, pa 16601.
[9] Anonymous, Annual Book of ASTM standards for Mechanical Testing of Materials, Vol. 3, 1995