1Young Researchers and Elite Club, Ilkhchi Branch, Islamic Azad University, Ilkhchi, Iran.
2Technical College of Tabriz No.2, Technical and Vocational University, Tabriz, Iran.
Equal channel angular pressing is the most promising method of severe plastic deformation with the capability of producing ultrafine grained materials. These materials exhibit improved mechanical and physical properties compared with their coarse grained counter parts.The temperature variation in the sample during ECA-pressing is a key factor determining the final microstructure and mechanical properties of processed material. Therefore, in the present study, temperature rise and temperature distribution in the sample was studied with the aid of finite element simulation. In this regard, the effect of friction, ram speed and material type on the amount of temperature rise and also the temperature profile in the sample was investigated. Results of FEM simulations showed good consistency with the temperature data acquired in the experimental work. In addition, it was shown that the sample temperature AND THE AMOUNT OF TEMPERATURE RISE increases with the increase of friction; ram speed and work hardening coefficient of the material.
L. Olejnik and A. Rosochowski, “Methods of fabricating metals for nano-technology”, Bulletin of the polish academy of sciences, Technical Science, 53, 2005, pp. 413-423.
R. Z. Valiev, Y. Estrin, Z. Horita, T. G. Langdon, M. J. Zehetbauer, Y. T. Zhu, “Producing bulk ultrafine-grained materials by severe plastic deformation”, JOM, April 2006, pp. 33-39.
T. C. Lowe, R. Z. Valiev, “The use of severe plastic deformation techniques in grain refinement”, JOM, October 2004, pp. 64-77.
J. M. Gray and A. J. DeArdo, “Austenite Conditioning Alternatives for Microalloyed Steels Products”, HSLA Steels: Metallurgy and Applications, Conference Proceeding, ASM International, Beijing, China, 1986, pp. 83- 96.
R. Z. Valiev, T. G. Langdon, “Principles of equal-channel angular pressing as a processing tool for grain refinement”, Progress in Materials Science, 51, 2006, pp. 881-981.
Sh. Xu, G. Zhao, X. Ma, G. Ren, “Finite element analysis and optimization of equal channel angular pressing for producing ultrafine-grained materials”, Journal of Materials Processing Technology, 184, 2007, pp. 209-216.
V. P. Basavaraj, U. Chakkingal, T. S. Prasanna Kumar, “Study of channel angle influence on material flow and strain inhomogeneity in equal channel angular pressing using 3D finite element simulation”, Journal of Materials Processing Technology, 209, 2009, pp. 89-95.
W. J. Kim, J. C. Namkung, “Computational analysis of effect of route on strain uniformity in equal channel angular extrusion”, Materials Science and Engineering A, 412, 2005, pp. 287-297.
R. B. Figueiredo, M. T. P. Aguilar, P. R. Cetlin, “Finite element modelling of plastic instability during ECAP processing of flow-softening materials”, Materials Science and Engineering A, 430, 2006, pp. 179-184.
T. Suo, Y. Li, Q. Deng, Y. Liu, “Optimal pressing route for continued equal channel angular pressing by finite element analysis”, Materials Science and Engineering A, 466, 2007, pp. 166-171.
N. Medeiros, J. F. C. Lins, L. P. Moreira, J. P. Gouvea, “The role of the friction during the equal channel angular pressing of an IF-steel billet”, Materials Science and Engineering A, 489, 2008, pp. 363-372.
Q. X. Pei, C. Lu, M. W. Fu, “Coupled thermo-mechanical analysis of severe plastic deformation for producing bulk nanostructured materials”, Advanced Engineering Materials, 6, 2004, pp. 933-936.
Q. X. Pei, B. H. Hu, C. Lu, Y. Y. Wang, “A finite element study of the temperature rise during equal channel angular pressing”, ScriptaMaterialia, 49, 2003, pp. 303-308.
H. S. Kim, “Prediction of temperature rise in equal channel angular pressing”, Materials transactions, 42, 2001, pp. 536-538.
D. Yamaguchi, Z. Horita, M. Nemoto, T. G. Langdon, “Significance of adiabatic heating in equal-channel angular pressing”, ScriptaMaterialia, 41, 1999, pp. 791-796.