Numerical Analysis of Severe Plastic Deformation by High Pressure Torsion
محورهای موضوعی : Chemistry
mohammadreza kaji
1
(Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.)
Ghader Faraji
2
(Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.)
کلید واژه: finite element modeling, High pressure torsion (HPT), Stress and strain distribution,
چکیده مقاله :
High-pressure torsion (HPT) is a metal processing method in which the sample is subjected to a very high plastic shear deformation. This process can produce exceptional levels of grain refinement, and provides a corresponding improvement in mechanical properties. To investigate the stress and strain distribution due to HPT process finite element simulation were conducted to investigate effective parameters. The simulation results demonstrate that the lowest effective strain obtained in the centers of the disk and the highest at the edges. Also, the mean stress varies linearly from the center of the disk to the edge region. The compressive stresses are higher in the disk centers and lower at the edges. By increasing the friction coefficient and the die angle, mean stress decrease and stress variation along the disc diameters become more homogeneous. Increasing of the pressure load leads to increase the mean stress and its heterogeneity along the disc radius.
References
[1] G. Faraji, M. M. Mashhadi, S. H. Joo, H. S. Kim, "The role of friction in tubular channel angular pressing," Rev. Adv. Mater. Sci., Vol. 31, 2012, pp. 12-18.
[2] M. A. Meyers, A. Mishra, D.J. Benson, "Mechanical properties of nanocrystalline materials", Prog. Mater. Sci., Vol. 51, 2006, pp. 427-556.
[3] D. G. R. Willian D. Callister "Fundamental of materials science and engineering," 2010.
[4] T.G.longdon, "the processing of ultra fine-grained metal throught the application of several plastic deformation," J. Mater. Sci., Vol. 47, 2007, pp. 211-216.
[5] U. C. Patil Basavaraj V, T.S. Prasanna Kumarb, "Effect of geometric parameters on strain, strain inhomogeneity and peak pressure in equal channel angular pressing – A study based on 3D finite element analysis," J. Manuf. Processes., Vol. 261, 2014, pp. 10-20.
[6] T. G. L. Alexander P. Zhilyaev "Using high-pressure torsion for metal processing: Fundamentals and applications," Prog. Mater. Sci., Vol. 53, 2008, pp. 893-979.
[7] M. L. Jung, G. Kim, N. Pardis, Yan E. Beygelzimer, Hyoung Seop Kim, "Finite element analysis of the plastic deformation in tandem process of simple shear extrusion and twist extrusion," Mater. Des., Vol. 83, 2015, pp. 858-865.
[8] M. N. M. Reihanian, "An analytical approach for necking and fracture of hard layer during accumulative roll bonding (ARB) of metallic multilayer," Mater. Des., Vol. 89, 2016, pp. 1213-1222.
[9] G. Faraji, M. Ebrahimi, and A. R. Bushroa, "Ultrasonic assisted tubular channel angular pressing process," Mater. Sci. Eng., A, Vol. 599, 2014, pp. 10-15.
[10] A. Babaei, G. Faraji, M. Mashhadi, and M. Hamdi, "Repetitive forging (RF) using inclined punches as a new bulk severe plastic deformation method," Mater. Sci. Eng., A, Vol. 558, 2012, pp. 150-157.
[11] P. W. Bridgman, "Effects of High Shearing Stress Combined with High Hydrostatic Pressure," Phys. Rev, Vol. 48, 1935, pp. 825-850.
[12] P. H. R. P. Roberto, B. Figueiredo, M. Teresa, P. Aguilar, "Using finite element modeling to examine the temperature distribution in quasi-constrained high-pressure torsion," Acta Mater., Vol. 60, 2012, pp. 1390-3198.
[13] C. G. John, J. Jonas, "The equivalent strain in high pressure torsion," Mater. Sci. Eng., A, Vol. 607, 2014, pp. 530-535.
[14] G. Faraji, M. Mashhadi, A. Dizadji, and M. Hamdi, "A numerical and experimental study on tubular channel angular pressing (TCAP) process," J. Mech. Sci. Technol., Vol. 26, 2012, pp. 3463-3468.
[15] D. Systèmes, Abaqus Documentation, ed, 2009.
[16] P. R. C. Roberto, B. Figueiredoa, T. G. Langdonc,, "Using finite element modeling to examine the flow processes in quasi-constrained high-pressure torsion," Mater. Sci. Eng., A, Vol. 528, 2011, pp. 8198-8204.
[17] H. S. L. Kim H.S , Lee.YS, "deformation behavior of copper during High Pressure Torsion Processing," J. Mater. Process. Technol., Vol. 142, 2003, pp. 334-337.
[18] E. Y. Y. Dong Jun Lee, S. H. Lee, S. Y. Kang , Hyoung Seop Kim, "FINITE ELEMENT ANALYSIS FOR COMPRESSION BEHAVIOR OF HIGH PRESSURE TORSION PROCESSING," Rev.Adv. Mater, Vol. 31, 2012, pp. 25-30.
[19] E. Y. Y. Dong Jun Lee , D. H. Ahn , B. H. Park , H. W. Park , L. J. Park, "Dislocation density-based finite element analysis of large strain deformation behavior of copper under high-pressure torsion," Acta Mater., Vol. 76, 2014, pp. 281-293.
