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Khamei, A.A., Dehghani, K., Bakhshi, S., Kalayeh, K.. (1394). Hot and Cold Tensile Behavior of Al 6061 Produced by Equal Channel Angular Pressing and Subsequent Cold Rolling. , 2(1), 30-42. doi: 10.22099/ijmf.2015.2913
A.A. Khamei; K. Dehghani; S. Bakhshi; K. Kalayeh. "Hot and Cold Tensile Behavior of Al 6061 Produced by Equal Channel Angular Pressing and Subsequent Cold Rolling". , 2, 1, 1394, 30-42. doi: 10.22099/ijmf.2015.2913
Khamei, A.A., Dehghani, K., Bakhshi, S., Kalayeh, K.. (1394). 'Hot and Cold Tensile Behavior of Al 6061 Produced by Equal Channel Angular Pressing and Subsequent Cold Rolling', , 2(1), pp. 30-42. doi: 10.22099/ijmf.2015.2913
Khamei, A.A., Dehghani, K., Bakhshi, S., Kalayeh, K.. Hot and Cold Tensile Behavior of Al 6061 Produced by Equal Channel Angular Pressing and Subsequent Cold Rolling. , 1394; 2(1): 30-42. doi: 10.22099/ijmf.2015.2913

Hot and Cold Tensile Behavior of Al 6061 Produced by Equal Channel Angular Pressing and Subsequent Cold Rolling

Iranian Journal of Materials Forming
مقاله 4، دوره 2، شماره 1، تیر 2015، صفحه 30-42    اصل مقاله (685.87 K)
شناسه دیجیتال (DOI): 10.22099/ijmf.2015.2913
نویسندگان
A.A. Khamei* 1؛ K. Dehghani1؛ S. Bakhshi2؛ K. Kalayeh3
1Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
2Metallic Materials Research Center (MMRC-MA), Malkashtar University, Tehran, Iran
3Department of Mechanical Engineering, University of Maryland, Baltimore County, USA
چکیده
The full annealing AA6061 aluminum alloy was subjected to severe plastic deformation
via the combination of equal channel angular pressing (ECAP) and cold rolling (CR) in order to
refine its microstructure and to improve its mechanical properties. According to the results of hot
and cold tensile tests, the combination of ECAP and CR significantly affected the final strength
and ductility of studied AA6061. Four passes of ECAP followed by 90% reduction in rolling led to
about 5.4 and 3.15 times increase in the yield and ultimate tensile strengths, respectively. In
addition, the hot ductility and strain rate sensitivity were increased by applying ECAP plus CR.
The changes in mechanical properties were attributed to the enhanced dislocation density and to
the reduced grain size. The results show that a decrease in grains/subgrains size (0.37 μm) and an
increase in the fraction of high angle grain boundaries, exhibited significant effect on the hot
ductility of higher severe plastic deformed sample.
کلیدواژه‌ها
severe plastic deformation؛ Ultrafine-Grained (UFG)؛ 6061 Al alloy؛ Rolling؛ Hot ductility
مراجع
1. M.J. Zehetbauer and Y.T. Zhu, Bulk nanostructure, (2009) Wiley-Vch.
2. R.Z. Valiev and T.G. Langdon, Principles of equal-channel angular pressing as a processing tool for grain
refinement, Progress Material Science, 51 (2006) 881-981.
3. R.Z. Valiev and T.G. Langdon, Achieving exceptional grain refinement through severe plastic deformation:
New approaches for improving the processing technology, Metallurgical and Materials Transactions A, 42
(2011) 2942-2951.
4. R.Z. Valiev, Nanostructuring of metals by severe plastic deformation for advanced properties, Nature Material,
3 (2004) 511-516.
5. S. Ferrasse, V.M. Segal, F. Alford, J. Kardokus and S. Strothers, Scale up and application of equal-channel
angular extrusion for the electronics and aerospace industries, Materials Science and Engineering A, 493 (2008)
130-140.
6. M. Vaseghi, A. Karimi Taheri, S.I. Hong and H.S. Kim, Dynamic ageing and the mechanical response of Al–
Mg–Si alloy through equal channel angular pressing, Material and Design, 31 (2010) 4076-4082.
7. S.K. Panigrahi and R. Jayaganthan, Development of ultrafine grained Al–Mg–Si alloy with enhanced strength
and ductility, Journal of Alloys and Compounds, 470 (2009) 285-288.
8. A. Loucif, R.B. Figueiredob, T. Baudin, F. Brisset and T.G. Langdon, Microstructural evolution in an Al-6061
alloy processed by high-pressure torsion, Materials Science and Engineering A, 527 (2010) 4864-4869.
9. E.C. Moreno-Valle, I. Sabirov, M.T. Perez-Prado, M.Y. Murashkin, E.V. Bobruk and R.Z. Valiev, Effect of the
grain refinement via severe plastic deformation on strength properties and deformation behavior of an Al6061
alloy at room and cryogenic temperatures, Material Letter, 65 (2011) 2917-2919.
10. M.R. Rezaei, M.R. Toroghinejad and F. Ashrafizadeh, Effects of ARB and ageing processes on mechanical
properties and microstructure of 6061 aluminum alloy, Journal of Materials Processing Technology, 211 (2011)
1184-1190.
11. A.A. Mogucheva and R.O. Kaibyshev, Structure and properties of aluminum alloy 1421 after equal-channel
angular pressing and isothermal rolling, The Physics of Metals and Metallography, 106 (2008) 424–433.
12. S. Ferrasse, V.M. Segal and E. Alford, Effect of additional processing on texture evolution of Al0.5Cu alloy
processed by equal channel angular extrusion (ECAE), Materials Science and Engineering A, 372 (2004) 44-55.

13. P.K. Chaudhury, B. Cherukuri and R. Srinivasan, Scaling up of equal-channel angular pressing and its effect on
mechanical properties, microstructure, and hot workability of AA 6061, Materials Science and Engineering A,
410–411 (2005) 316–318.
14. K.T. Park, H.J. Lee, C.S. Lee, W.J. Nam, D.H. Shin, Enhancement of high strain rate superplastic elongation of
a modified 5154 Al by subsequent rolling after equal channel angular pressing, Scripta Materialia, 51, (2004)
479-483.
15. A.R. Eivani and A. Karimi Taheri, Effective strain based on shear and principal strains in equal channel angular
extrusion with outer curved corner, Computational Materials Science, 41 (2008) 409–419.
16. M. Kamachi, M. Furukawa, Z. Horita and T.G. Langdon, Equal-channel angular pressing using plate samples,
Materials Science and Engineering, A361 (2003) 258–266.
17. ASTM E8/E8M−13a, American Society for Testing and Materials Standard Test Methods for Tension Testing of
Metallic Materials, (2013) 1–28.
18. B. Cherukuri, T.S. Nedkova and R. Srinivasan, A comparison of the properties of SPD-processed AA-6061 by
equal-channel angular pressing, multi-axial compressions/forgings and accumulative roll bonding, Materials
Science and Engineering A 410–411 (2005) 394–397.
19. S.H. Lee, Y. Saito, T. Sakai and H. Utsunomiya, Accumulative roll bonding of pure copper and IF steel,
Materials Science and Engineering A, 325 (2002) 228-235.
20. Z. Horita, T. Fujinami, M. Nemoto and T. G. Langdon, Equal-channel angular pressing of commercial
aluminum alloys: Grain refinement, thermal stability and tensile properties, Metallurgical and Materials
Transactions A, 31 (2000) 691-701.
21. Y.W. Tham, M.W. Fu, H.H. Hng, Q.X. Pei and K.B. Lim, Microstructure and properties of Al-6061 alloy by
equal channel angular extrusion for 16 passes, Materials and Manufacturing Processes, 22 (2007) 819–824.
22. W.J. Kim, J.Y.Wang, S.O. Choi, H.J. Choi and H.T. Sohn, Synthesis of ultra high strength Al–Mg–Si alloy
sheets by differential speed rolling, Materials Science and Engineering A, 520 (2009) 23–28.
23. J.K. Kim, H.K. Kim, J.W. Park, W.J. Kim, Large enhancement in mechanical properties of the 6061 Al alloys
after a single pressing by ECAP, Scripta Materialia, 53 (2005) 1207–1211.
24. H. Akamatsu, T. Fujinami, Z. Horita, T.G. Langdon, Influence of rolling on the superplastic behavior of an Al-
Mg-Sc alloy after ECAP, Scripta Materialia, 44 (2001) 759-764.
25. K.T. Park, H.J. Lee, Ch.S. Lee and D.H. Shin, Effect of post-rolling after ECAP on deformation behavior of
processed by ECAP Commercial Al–Mg Alloy at 723K, Materials Science and Engineering A, 393 (2005) 118–
124.
26. W.J. Kim and S.J. Yoo, Enhanced ductility and deformation mechanisms of ultrafinegrained Al–Mg–Si alloy in
sheet form at warm temperatures, Scripta Material, 61 (2009) 125-128.
27. K.T. Park, H.J. Kwon, W.J. Kim and Y.S. Kim, Microstructural characteristics and thermal stability of ultrafine
grained 6061 Al alloy fabricated by accumulative roll bonding process, Materials Science and Engineering A,
316 (2001) 145–152.
28. M.W. Fu, Y.W. Tham, H.H. Hng and K.B. Lim, The grain refinement of Al-6061 via ECAE processing:
Deformation behavior, microstructure and property, Materials Science and Engineering A, 526 (2009) 84-92.
29. B. Gopi, N. Naga Krishna, K. Venkateswarlu and K. Sivaprasad, Influence of rolling temperature on
microstructure and mechanical properties of cryorolled Al-Mg-Si alloy, World Academy of Science, Engineering
and Technology, 61 (2012) 731-735.
30. L. Kurmanaeva, Yu. Ivanisenko, J. Markmanna, C. Kübel, A. Chuvilin, S. Doyle, R.Z. Valiev and H.J. Fecht,
Grain refinement and mechanical properties in ultrafine grained Pd and Pd–Ag alloys produced by HPT,
Materials Science and Engineering, A 527 (2010) 1776–1783.
31. E. Cerri and P. Leo, Influence of severe plastic deformation on aging of Al–Mg–Si alloys, Materials Science and
Engineering A, 410–411 (2005) 226–229.

32. E. Tan, A.A. Kibar and C.H. Gür, Mechanical and microstructural characterization of 6061 aluminum alloy
strips severely deformed by dissimilar channel angular pressing, Materials Characterization, 62 (2011) 391 –
397.
33. Z. Lee, F. Zhou, R.Z. Valiev, E.J. Lavernia and S.R. Nutt, Microstructure and microhardness of cryomilled bulk
nanocrystalline Al–7.5%Mg alloy consolidated by high pressure torsion, Scripta Materialia, 51 (2004) 209–214.
34. M. Weiss, A.S. Taylor, P.D. Hodgson and N. Stanford, Strength and biaxial formability of cryo-rolled 2024
aluminium subject to concurrent recovery and precipitation, Acta Materialia 61 (2013) 5278-5289.
35. A.A. Mazilkin et al. Softening of nanostructured Al–Zn and Al–Mg alloys after severe plastic deformation, Acta
Materialia, 54 (2006) 3933–3939.
36. A.A. Mazilkin, B.B. Straumal, E. Rabkin, B. Baretzky, S. Enders, S.G. Protasova, O.A. Kogtenkova and R.Z.
Valiev, Grain refinement and properties of pure Ti processed by warm ECAP and cold rolling, Materials
Science and Engineering A 343 (2003) 43-50.
37. H. Ferkel, Y. Estrin, C. Blawert and R.Z. Valiev, RF nitriding of severely deformed Armco iron and St2K50,
Surface and Coatings Technology, 173 –174 (2003) 1164–1170.
38. Y.H. Zhao, Y.Z. Guo, Q. Wei, A.M. Dangelewicz, C. Xu, Y.T. Zhu, T.G. Langdon, Y.Z. Zhou and E.J.
Lavernia, Influence of specimen dimensions on the tensile behavior of ultrafine-grained Cu, Scripta Materialia,
59 (2008) 627–630.
39. J. Schiøtz, F. D. Di Tolla and K. W. Jacobsen, Softening of nanocrystalline metals at very small grain sizes,
Nature, 391 (1998) 561–563.
40. G.E. Dieter, H.A. Kuhn and S.L. Semiatin, Handbook of Workability and Process Design, ASM International,
first edition, (2003).
41. H.J. McQueen, S. Spigarelli, M.E. Kassner and E. Evangelista, Hot deformation and processing of aluminum
alloys, first edition, Taylor & Francis Group (2011).
42. V.L. Niranjani, K.C. Hari Kumar and V. Subramanya Sarma, Development of high strength Al–Mg–Si AA6061
alloy through cold rolling and Ageing, Materials Science and Engineering A, 515 (2009) 169–174
43. Ch. Xu, M. Furukawa, Z. Horita and T.G. Langdon, Using ECAP to achieve grain refinement, precipitate
fragmentation and high strain rate superplasticity in a spraycast aluminum alloy, Acta Materialia, 51 (2003)
6139–6149.
44. E. Avtokratova, O. Sitdikov, M. Markushev and R. Mulyukov, Extraordinary high-strain rate superplasticity of
severely deformed Al–Mg–Sc–Zr alloy, Materials Science and Engineering A, 538 (2012) 386– 390.
45. K.T. Park, H.J. Lee, Ch.S. Lee and D.H. Shin, Effect of post-rolling after ECAP on deformation behavior of
processed by ECAP commercial Al–Mg alloy at 723K, Materials Science and Engineering A, 393 (2005) 118–
124.
46. A.A. Mogucheva and R.O. Kaibyshev, Structure and properties of aluminum alloy 1421 after equal-channel
angular pressing and isothermal rolling, The Physics of Metals and Metallography, 106 (2008) 424–433.

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