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Torabi, Mohsen, Eivani, Ali Reza, Jafarian, Hamidreza, Salehi, Mohammad Taghi. (1396). Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing. , 50(2), 90-97. doi: 10.22059/jufgnsm.2017.02.02
Mohsen Torabi; Ali Reza Eivani; Hamidreza Jafarian; Mohammad Taghi Salehi. "Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing". , 50, 2, 1396, 90-97. doi: 10.22059/jufgnsm.2017.02.02
Torabi, Mohsen, Eivani, Ali Reza, Jafarian, Hamidreza, Salehi, Mohammad Taghi. (1396). 'Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing', , 50(2), pp. 90-97. doi: 10.22059/jufgnsm.2017.02.02
Torabi, Mohsen, Eivani, Ali Reza, Jafarian, Hamidreza, Salehi, Mohammad Taghi. Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing. , 1396; 50(2): 90-97. doi: 10.22059/jufgnsm.2017.02.02

Re-strengthening in AA6063 Alloy During Equal Channel Angular Pressing

Journal of Ultrafine Grained and Nanostructured Materials
مقاله 2، دوره 50، شماره 2، اسفند 2017، صفحه 90-97    اصل مقاله (811.01 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/jufgnsm.2017.02.02
نویسندگان
Mohsen Torabi؛ Ali Reza Eivani* ؛ Hamidreza Jafarian؛ Mohammad Taghi Salehi
School of Metallurgy and materials Engineering, Iran University of Science and Technology, Tehran, Iran
چکیده
Equal channel angular pressing (ECAP) is carried out using two different configurations for the exit channel of the ECAP die, i.e., relieved and choked, with angles of 0.2 °. It is found that using a die with relieved exit channel, the sample was extruded for 6 passes with no surface cracks and an average cell size of 727 nm and a fraction of high angle grain boundaries of 54 % were achieved. Measured values of yield strength (YS) and ultimate tensile strength (UTS) were reported to be 201.1 and 259.5, respectively. By using the die with choked exit channel, it was possible to deform the sample for up to 14 passes with no sign of surface cracking. A relatively finer cell structure around 530 nm was achieved and the fraction of HAGBs increased to 64 %. Relative increases in YS and UTS were as well observed indicating that re-strengthening has been activated in the material after saturation at the 4th pass. In addition, the mechanism of grain refinement seemed to change to progressive lattice rotation evidenced by formation of trapped single grains within the size range of less than 100 nm.
 
کلیدواژه‌ها
Equal channel angular pressing؛ Die exit channel؛ Workability؛ Re-strengthening
مراجع
1. M. Fatemi, A. Zarei-Hanzaki, Review on ultrafined/nanostructured magnesium alloys produced through severe plastic deformation: microstructures, J. Ultrafine Grained Nanostructured Mater. 48 (2015) 69–83.

2. A. Khajezade, M. Habibi Parsa, H. Mirzadeh, M. Montazeri-pour, Grain Refinement Efficiency of Multi-Axial Incremental Forging and Shearing: A Crystal Plasticity Analysis, J. Ultrafine Grained Nanostructured Mater. 49 (2016) 11–16.

3. N. Mohammad Nejad Fard, H. Mirzadeh, R. Mohammad, J.-M. Cabrera, Accumulative Roll Bonding of Aluminum/Stainless Steel Sheets, J. Ultrafine Grained Nanostructured Mater. 50 (2017) 1–5.

4. E. Borhani, H. Jafarian, Effect of Pre-existing Nano Sized Precipitates on Microstructure and Mechanical Property of Al-0.2 wt% Sc Highly Deformed by ARB Process, J. Ultrafine Grained Nanostructured Mater. 47 (2014) 1–7.

5. S.M. Fatemi, A. Zarei-Hanzaki, Mechanical Behavior of an Ultrafine/Nano Grained Magnesium Alloy, J. Ultrafine Grained Nanostructured Mater. 50 (2017) 6–15.

6. Segal VM. Severe plastic deformation: simple shear versus pure shear. Materials Science and Engineering: A. 2002;338(1-2):331-44.

7. Iwahashi Y, Wang J, Horita Z, Nemoto M, Langdon TG. Principle of equal-channel angular pressing for the processing of ultra-fine grained materials. Scripta Materialia. 1996;35(2):143-6.

8. Eivani AR, Karimi Taheri A. The effect of dead metal zone formation on strain and extrusion force during equal channel angular extrusion. Computational Materials Science. 2008;42(1):14-20.

9. Eivani AR, Karimi Taheri A. An upper bound solution of ECAE process with outer curved corner. Journal of Materials Processing Technology. 2007;182(1-3):555-63.

10. Iwahashi Y, Horita Z, Nemoto M, Langdon TG. The process of grain refinement in equal-channel angular pressing. Acta Materialia. 1998;46(9):3317-31.

11. Iwahashi Y, Horita Z, Nemoto M, Langdon TG. An investigation of microstructural evolution during equal-channel angular pressing. Acta Materialia. 1997;45(11):4733-41.

12. Valiev RZ, Langdon TG. Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science. 2006;51(7):881-981.

13. Mathieu JP, Suwas S, Eberhardt A, Tóth LS, Moll P. A new design for equal channel angular extrusion. Journal of Materials Processing Technology. 2006;173(1):29-33.

14. Yoon SC, Quang P, Hong SI, Kim HS. Die design for homogeneous plastic deformation during equal channel angular pressing. Journal of Materials Processing Technology. 2007;187-188:46-50.

15. Segal V. Engineering and commercialization of equal channel angular extrusion (ECAE). Materials Science and Engineering A. 2004;386(1-2):269-76.

16. Semiatin SL, DeLo DP. Equal channel angular extrusion of difficult-to-work alloys. Materials & Design. 2000;21(4):311-22.

17. Kim HS, Seo MH, Hong SI. On the die corner gap formation in equal channel angular pressing. Materials Science and Engineering: A. 2000;291(1-2):86-90.

18. Semiatin SL, DeLo DP, Shell EB. The effect of material properties and tooling design on deformation and fracture during equal channel angular extrusion. Acta Materialia. 2000;48(8):1841-51.

19. Ferrasse S, Hartwig KT, Goforth RE, Segal VM. Microstructure and properties of copper and aluminum alloy 3003 heavily worked by equal channel angular extrusion. Metallurgical and Materials Transactions A. 1997;28(4):1047-57.

20. Dalla Torre F, Lapovok R, Sandlin J, Thomson PF, Davies CHJ, Pereloma EV. Microstructures and properties of copper processed by equal channel angular extrusion for 1–16 passes. Acta Materialia. 2004;52(16):4819-32.

21. Sun P-L, Kao P-W, Chang C-P. Effect of deformation route on microstructural development in aluminum processed by equal channel angular extrusion. Metallurgical and Materials Transactions A. 2004;35(4):1359-68.

22. Ferrasse S, Segal VM, Kalidindi SR, Alford F. Texture evolution during equal channel angular extrusion. Materials Science and Engineering: A. 2004;368(1-2):28-40.

23. Nakashima K, Horita Z, Nemoto M, Langdon TG. Influence of channel angle on the development of ultrafine grains in equal-channel angular pressing. Acta Materialia. 1998;46(5):1589-99.

24. Xia K, Wang JT, Wu X, Chen G, Gurvan M. Equal channel angular pressing of magnesium alloy AZ31. Materials Science and Engineering: A. 2005;410-411:324-7.

25. Lapovok RY. The role of back-pressure in equal channel angular extrusion. Journal of Materials Science. 2005;40(2):341-6.

26. Xu C, Xia K, Langdon TG. The role of back pressure in the processing of pure aluminum by equal-channel angular pressing. Acta Materialia. 2007;55(7):2351-60.

27. Shadabroo MS, Eivani AR, Jafarian HR, Razavi SF, Zhou J. Optimization of interpass annealing for a minimum recrystallized grain size and further grain refinement towards nanostructured AA6063 during equal channel angular pressing. Materials Characterization. 2016;112:160-8.

28. Valipour S, Eivani AR, Jafarian HR, Seyedein SH, Aboutalebi MR. Effect of pre-deformation thermomechanical processing on the development of ultrafine grain structure during equal channel angular extrusion. Materials & Design. 2016;89:377-84.

29. Das M, Das G, Ghosh M, Wegner M, Rajnikant V, GhoshChowdhury S, et al. Microstructures and mechanical properties of HPT processed 6063 Al alloy. Materials Science and Engineering: A. 2012;558:525-32.

30. Edalati K, Fujioka T, Horita Z. Microstructure and mechanical properties of pure Cu processed by high-pressure torsion. Materials Science and Engineering: A. 2008;497(1-2):168-73.

31. Harai Y, Ito Y, Horita Z. High-pressure torsion using ring specimens. Scripta Materialia. 2008;58(6):469-72.

32. Ito Y, Horita Z. Microstructural evolution in pure aluminum processed by high-pressure torsion. Materials Science and Engineering: A. 2009;503(1-2):32-6.

33. Yamashita A, Horita Z, Langdon TG. Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation. Materials Science and Engineering: A. 2001;300(1-2):142-7.

34. Yamashita A, Yamaguchi D, Horita Z, Langdon TG. Influence of pressing temperature on microstructural development in equal-channel angular pressing. Materials Science and Engineering: A. 2000;287(1):100-6.

35. Torabi M, Eivani AR, Jafarian H, Salehi MT. Die Design Modification to Improve Workability during Equal Channel Angular Pressing. Advanced Engineering Materials. 2016;18(8):1469-77.

36. Gubicza J, Chinh NQ, Lábár JL, Dobatkin S, Hegedűs Z, Langdon TG. Correlation between microstructure and mechanical properties of severely deformed metals. Journal of Alloys and Compounds. 2009;483(1-2):271-4.

37. Dobatkin SV, Szpunar JA, Zhilyaev AP, Cho JY, Kuznetsov AA. Effect of the route and strain of equal-channel angular pressing on structure and properties of oxygen-free copper. Materials Science and Engineering: A. 2007;462(1-2):132-8.

38. Ashrafizadeh SM, Eivani AR. Correlative evolution of microstructure, particle dissolution, hardness and strength of ultrafine grained AA6063 alloy during annealing. Materials Science and Engineering: A. 2015;644:284-96.

39. Valipour S, Eivani AR, Jafarian HR, Seyedein SH, Aboutalebi MR. Effect of pre-deformation thermomechanical processing on the development of ultrafine grain structure during equal channel angular extrusion. Materials & Design. 2016;89:377-84.

40. Chinh NQ, Gubicza J, Czeppe T, Lendvai J, Xu C, Valiev RZ, et al. Developing a strategy for the processing of age-hardenable alloys by ECAP at room temperature. Materials Science and Engineering: A. 2009;516(1-2):248-52.

41. Valiev RZ, Islamgaliev RK, Alexandrov IV. Bulk nanostructured materials from severe plastic deformation. Progress in Materials Science. 2000;45(2):103-89.

42. A. Rollett, F.J. Humphreys, G.S. Rohrer, M. Hatherly, Recrystallization and related annealing phenomena, Elsevier, 2004.

43. Iwahashi Y, Horita Z, Nemoto M, Langdon TG. Factors influencing the equilibrium grain size in equal-channel angular pressing: Role of Mg additions to aluminum. Metallurgical and Materials Transactions A. 1998;29(10):2503-10.

44. Furukawa M. Influence of magnesium on grain refinement and ductility in a dilute Al–Sc alloy. Acta Materialia. 2001;49(18):3829-38.

 

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