Plastic Deformation Characteristics of Continuous Confined Strip Shearing Process Considering the Deformation Homogeneity and Damage Accumulation

Document Type: Research Paper


Department of Materials Science Engineering, University of Bonab, Bonab, Iran


In the present investigation, two dimensional elastoplastic finite element analysis was conducted to assess the deformation characteristics of Al 1100 alloy during continuous confined strip shearing (C2S2) process. The results of simulations showed that the plastic strain distribution across the deformed sample is non-uniform irrespective of the amount of friction and C2S2 die angle. The most uniform distribution of equivalent strain is achieved when the friction coefficient and die angle are equal to 0.3 and 90˚ respectively.  It was also observed that the maximum damage factor is located in the inner regions of the cross section of the plate similar to the conventional ECAP processing of soft materials with higher strain hardenability. According to a set of simulations, executed at different frictions and die angles, it was demonstrated that the safest condition is achieved during deformation with a friction coefficient of 0.3 and die angles of 90˚ and 110˚. Besides, the analysis of the equivalent strain rate pattern showed that the width of the deformation zone decreases by increasing the friction coefficient and decreasing the C2S2 die angle.         


[1]  T. Tanaka, Controlled rolling of steel plate and strip, International of Materials Reviews, 26 (1981) 185-212.
[2]  H. Ding, N. Shen, Y. C. Shin, Predictive modeling of grain refinement during multi-pass cold rolling, J Journal of Materials Processing Technology, 212 (2012) 1003-1013.
[3]  A. Salem, M. Glavicic, S. Semiatin, The effect of preheat temperature and inter-pass reheating on microstructure and texture evolution during hot rolling of Ti–6Al–4V, Materials Science and Engineering A, 496 (2008) 169-176.
[4]  C. Zheng, N. Xiao, D. Li, Y. Li, Microstructure prediction of the austenite recrystallization during multi-pass steel strip hot rolling: A cellular automaton modeling, Computational Materials Science, 44 (2008)  507-514.
[5]  A. P. Zhilyaev, T. G. Langdon, Using high-pressure torsion for metal processing: Fundamentals and applications, Progress in Materials Science, 53 (2008) 893-979.
[6]  Y. Saito, H. Utsunomiya, N. Tsuji, T. Sakai, Novel ultra-high straining process for bulk materials—development of the accumulative roll-bonding (ARB) process, Acta Materialia, 47 (1999) 579-583.
[7]   D. H. Shin, J. J. Park, Y. S. Kim, K. T. Park, Constrained groove pressing and its application to grain refinement of aluminum, Materials Science and Engineering A, 328 (2002) 98-103.
[8]  Y. Iwahashi, J. Wang, Z. Horita, M. Nemoto, T. G. Langdon, Principle of equal-channel angular pressing for the processing of ultra-fine grained materials, Scripta Materialia, 35 (1996) 143-146.
[9]  J. Xing, H. Soda, X. Yang, H. Miura, T. Sakai, Ultra-fine grain development in an AZ31 magnesium alloy during multi-directional forging under decreasing temperature conditions, Materials Transactions, 46 (2005) 1646-1650.
[10]     G. Faraji, A. Babaei, M. M. Mashhadi, K. Abrinia, Parallel tubular channel angular pressing (PTCAP) as a new severe plastic deformation method for cylindrical tubes, Materials Letters, 77 (2012) 82-85.
[11]     S. Fatemi-Varzaneh, A. Zarei-Hanzaki, Processing of AZ31 magnesium alloy by a new noble severe plastic deformation method, Materials Science and Engineering A, 528 (2011)1334-1339.
[12]     N. Pardis, R. Ebrahimi, Deformation behavior in Simple Shear Extrusion (SSE) as a new severe plastic deformation technique, Materials Science and Engineering A, 527 (2009) 355-360.
[13]     Q. Wang, Y. Chen, J. Lin, L. Zhang, C. Zhai, Microstructure and properties of magnesium alloy processed by a new severe plastic deformation method, Materials Letters, 61 (2007) 4599-4602.
[14]     V. Segal, Slip line solutions, deformation mode and loading history during equal channel angular extrusion, Materials Science and Engineering A, 345 (2003) 36-46.
[15]     Y. Miyahara, Z. Horita, T. G. Langdon, Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP, Materials Science and Engineering A, 420 (2006) 240-244.
[16]     X. Molodova, G. Gottstein, M. Winning, R. Hellmig, Thermal stability of ECAP processed pure copper, Materials Science and Engineering A, 460 (2007) 204-213.
[17]     X. Zhao, X. Yang, X. Liu, X. Wang, T. G. Langdon, The processing of pure titanium through multiple passes of ECAP at room temperature, Materials Science and Engineering A, 527 (2010) 6335-6339.
[18]     A. Zhilyaev, D. Swisher, K. Oh-Ishi, T. Langdon, T. McNelley, Microtexture and microstructure evolution during processing of pure aluminum by repetitive ECAP, Materials Science and Engineering A, 429 (2006) 137-148.
[19]     S. Xu, G. Zhao, X. Ren, Y. Guan, Numerical investigation of aluminum deformation behavior in three-dimensional continuous confined strip shearing process, Materials Science and Engineering A, 476 (2008) 281-289.
[20]     J. C. Lee, H. K. Seok, J. Y. Suh, Microstructural evolutions of the Al strip prepared by cold rolling and continuous equal channel angular pressing, Acta Materialia, 50 (2002) 4005-4019.
[21]     W. Wei, W. Zhang, K. X. Wei, Y. Zhong, G. Cheng, J. Hu, Finite element analysis of deformation behavior in continuous ECAP process, Materials Science and Engineering A, 516 (2009) 111-118.
[22]     V. P. Basavaraj, U. Chakkingal, T. P. 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) 89-95.
[23]     R. B. Figueiredo, P. R. Cetlin, T. G. Langdon, The processing of difficult-to-work alloys by ECAP with an emphasis on magnesium alloys, Acta Materialia, 55 (2007) 4769-4779.
[24]     F. Kang, J. T. Wang, Y. Peng, Deformation and fracture during equal channel angular pressing of AZ31 magnesium alloy, Materials Science and Engineering A, 487 (2008) 68-73.
[25]     M. S. Ghazani, B. Eghbali, Finite element simulation of cross equal channel angular pressing, Computational Materials Science, 74, (2013) 124-128.
[26]     M. S. Ghazani, A. Vajd, Finite Element Simulation of Flow Localization during Equal Channel Angular Pressing, Transactions of the Indian Institute of Metals, 70 (2017) 1323-1328.