[1] R.Z. Valiev, R.K. Islamgaliev, I.V. Alexandrov, Bulk nanostructured materials from severe plastic deformation, Prog. Mater Sci., 45(2) (2000) 103-189.
[2] S.H.C. Park, Y.S. Sato, H. Kokawa, Microstructural evolution and its effect on Hall-Petch relationship in friction stir welding of thixomolded Mg alloy AZ91D, J. Mater. Sci., 38(21) (2003) 4379-4383.
[3] P. Kumar, M. Kawasaki, T.G. Langdon, Overcoming the paradox of strength and ductility in ultrafine-grained materials at low temperatures, J. Mater. Sci., 51(1) (2016) 7-18.
[4] L.S. Toth, C. Gu, Ultrafine-grain metals by severe plastic deformation, Mater. Charact., 92 (2014) 1-14.
[5] E. Bagherpour, N. Pardis, M. Reihanian, R. Ebrahimi, An overview on severe plastic deformation: research status, techniques. classification, microstructure evolution, and applications, Int. J. Adv. Manuf. Technol., 100(5-8) (2019) 1647-1694.
[6] R.Z. Valiev, T.G. Langdon, Principles of equalchannel angular pressing as a processing tool for grain refinement, Prog. Mater Sci., 51(7) (2006) 881-981.
[7] E. Bagherpour, M. Reihanian, N. Pardis, R. Ebrahimi, T.G. Langdon, Ten years of severe plastic deformation (SPD) in Iran, part I: equal channel angular pressing (ECAP), Iran. J. Mater. Form., 5(1) (2018) 71-113.
[8] A.P. Zhilyaev, T.G. Langdon, Using high-pressure torsion for metal processing: Fundamentals and applications, Prog. Mater. Sci., 53(6) (2008) 893-979.
[9] Y. Beygelzimer, V. Varyukhin, S. Synkov, D. Orlov, Useful properties of twist extrusion, Mater. Sci. Eng., A, 503(1-2) (2009) 14-17.
[10] F. Heydari, H. Saljoghi, S.H. Nourbakhsh, Numerical investigation of the cross-section and twist extrusion die angle on the distribution of plastic strain and microstructure of Al7050 Alloy, J. Stress Anal., 4(2) (2020) 1-8.
[11] Y. Saito, H. Utsunomiya, N. Tsuji, T. Sakai, Novel ultra-high straining process for bulk materialsdevelopment of the accumulative roll-bonding (ARB) process, Acta Mater., 47(2) (1999) 579-583.
[12] M. Reihanian, E. Bagherpour, N. Pardis, R. Ebrahimi, N. Tsuji, Ten years of severe plastic deformation (SPD) in Iran, part II: accumulative roll bonding (ARB), Iran. J. Mater. Form., 5(2) (2018) 1-25.
[13] N. Pardis, R. Ebrahimi, Deformation behavior in Simple Shear Extrusion (SSE) as a new severe plastic deformation technique, Mater. Sci. Eng., A, 527(1-2) (2009) 355-360.
[14] H. Mozafari, F. Akbaripanah, Changes in Grain Size, Texture, and Mechanical Properties of AZ31/(TiO2)p Nanocomposites Processed by Isothermal Multidirectional Forging, J. Stress Anal., 4(2) (2020) 45-53.
[15] Y. Nishida, H. Arima, J.C. Kim, T. Ando, Development of the ECAP with a rotary die and its application to AC4C aluminum alloy, Journal of Japan Institute of Light Metals, 50(12) (2000) 655-659.
[16] L. Zuyan, W. Zhongjin, Finite-element analysis of the load of equal-cross-section lateral extrusion, J. Mater. Process. Technol., 94(2-3) (1999) 193-196.
[17] G.I. Raab, Fizika i Tekhnika Vysokikh Davleniy, Physics and Engineering of High Pressures, 14(4) (2004) 83.
[18] G. Raab, Plastic flow at equal channel angular processing in parallel channels, Mater. Sci. Eng., A, 410-411 (2005) 230-233.
[19] M. Abdi, R. Ebrahimi, Twin parallel channel angular extrusion as a development of ECAE in parallel channels, SN Appl. Sci., 2 (2020) 548.
[20] M. Abdi, R. Ebrahimi, Friction Effect on the Required Load in Twin Parallel Channel Angular Extrusion The 9th International Conference on Materials Engineering and Metallurgy, Tehran, Iran. (2020).
[21] M. Abdi, R. Ebrahimi, XRD Analysis of Cell Size and Dislocation Density in Twin Parallel Channel Angular Extrusion, The 28th Annual International Conference of Iranian Society of Mechanical Engineers-ISME2020, Tehran, Iran, (2020).
[22] F.P. Beer, E.R. Johnston, J.T. DeWolf, Mechanics of Materials, 3rd edn, Columns. In: N.S. Prasad, S. Krishnamurthy (ed), Tata McGraw-Hill, New Delhi, (2004).