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Journal of Materials Science

, Volume 50, Issue 20, pp 6700–6712 | Cite as

Microstructural homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion

  • Megumi KawasakiEmail author
  • Han-Joo Lee
  • Terence G. Langdon
Original Paper
  • 301 Downloads

Abstract

An Al–33 % Cu eutectic alloy was processed by high-pressure torsion (HPT) at room temperature under a compressive pressure of 6.0 GPa for different revolutions up to 10 turns. The Vickers microhardness and microstructure were investigated on vertical cross sections of the disks to evaluate the evolution toward homogeneity with increasing numbers of HPT turns. The hardness behavior follows the strain hardening model of materials after HPT processing and the microstructural development confirms that there is essentially a compatibility between hardness and microstructure in the Al–Cu alloy when processing by HPT. The tensile properties were examined at a high temperature of 723 K after 5 and 10 turns of HPT using a series of strain rates from 3.3 × 10−5 to 1.0 × 10−1 s−1. Excellent superplastic ductilities were achieved when testing at strain rates below 1.0 × 10−3 s−1 with a highest elongation of ~1220 % after 10 turns at an initial strain rate of 1.0 × 10−4 s−1. Close inspection showed that the optimal superplastic strain rates are displaced to a faster strain rate with increasing revolutions from 5 to 10 turns. A deformation mechanism map was constructed for a testing temperature of 723 K using a combination of theoretical relationships and earlier experimental data reported for a conventional coarse-grained Al–33 % Cu alloy. Inspection shows that this map is in excellent agreement with the experimental data for the ultrafine-grained Al–33 % Cu alloy after processing by HPT.

Keywords

Eutectic Alloy Vertical Cross Section Disk Thickness Superplastic Flow Severe Plastic Deformation Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was supported in part by the NRF Korea funded by MoE under Grant No. NRF-2014R1A1A2057697 (MK), in part by the National Science Foundation of the United States under Grant No. DMR-1160966 and in part by the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS (TGL).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

References

  1. 1.
    Valiev RZ, Estrin Y, Horita Z, Langdon TG, Zehetbauer MJ, Zhu YT (2006) Producing bulk ultrafine-grained materials by severe plastic deformation. JOM 58(4):33–39CrossRefGoogle Scholar
  2. 2.
    Langdon TG (2013) Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement. Acta Mater 61:7035–7059CrossRefGoogle Scholar
  3. 3.
    Zhilyaev AP, Langdon TG (2008) Using high-pressure torsion for metal processing: Fundamentals and applications. Prog Mater Sci 53:893–979CrossRefGoogle Scholar
  4. 4.
    Valiev RZ, Ivanisenko YuV, Rauch EF, Baudelet B (1996) Structure and deformation behaviour of Armco iron subjected to severe plastic deformation. Acta Mater 44:4705–4712CrossRefGoogle Scholar
  5. 5.
    Zhilyaev AP, Lee S, Nurislamova GV, Valiev RZ, Langdon TG (2001) Microhardness and microstructural evolution in pure nickel during high-pressure torsion. Scripta Mater 44:2753–2758CrossRefGoogle Scholar
  6. 6.
    Zhilyaev AP, Nurislamova GV, Kim B-K, Baro MD, Szpunar JA, Langdon TG (2003) Experimental parameters influencing grain refinement and microstructural evolution during high-pressure torsion. Acta Mater 51:753–765CrossRefGoogle Scholar
  7. 7.
    Estrin Y, Molotnikov A, Davies CHJ, Lapovok R (2008) Strain gradient plasticity modelling of high-pressure torsion. J Mech Phys Solids 56:1186–1202CrossRefGoogle Scholar
  8. 8.
    Langdon TG (1982) The mechanical properties of superplastic materials. Metall Trans A 13A:689–701CrossRefGoogle Scholar
  9. 9.
    Kawasaki M, Langdon TG (2014) Review: achieving superplasticity in metals processed by high-pressure torsion. J Mater Sci 49:6487–6496. doi: 10.1007/s10853-014-8204-5 CrossRefGoogle Scholar
  10. 10.
    Kawasaki M, Langdon TG (2011) Developing superplasticity and a deformation mechanism map for the Zn–Al eutectoid alloy processed by high-pressure torsion. Mater Sci Eng A528:6140–6145CrossRefGoogle Scholar
  11. 11.
    Kawasaki M, Foissey J, Langdon TG (2013) Development of hardness homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion. Mater Sci Eng A561:118–125CrossRefGoogle Scholar
  12. 12.
    Kawasaki M, Langdon TG (2008) The significance of strain reversals during processing by high-pressure torsion. Mater Sci Eng A498:341–348CrossRefGoogle Scholar
  13. 13.
    Figueiredo RB, Cetlin PR, Langdon TG (2011) Using finite element modeling to examine the flow processes in quasi-constrained high-pressure torsion. Mater Sci Eng A528:8198–8204CrossRefGoogle Scholar
  14. 14.
    Figueiredo RB, Pereira PHR, Aguilar MTP, Cetlin PR, Langdon TG (2012) Using finite element modeling to examine the temperature distribution in quasi-constrained high-pressure torsion. Acta Mater 60:3190–3198CrossRefGoogle Scholar
  15. 15.
    Loucif A, Figueiredo RB, Kawasaki M, Baudin T, Brisset F, Chemam R, Langdon TG (2012) Effect of aging on microstructural development in an Al–Mg–Si alloy processed by high-pressure torsion. J Mater Sci 47:7815–7820. doi: 10.1007/s10853-012-6400-8 CrossRefGoogle Scholar
  16. 16.
    Kawasaki M (2014) Different models of hardness evolution in ultrafine-grained materials processed by high-pressure torsion. J Mater Sci 49:18–34. doi: 10.1007/s10853-013-7687-9 CrossRefGoogle Scholar
  17. 17.
    Kawasaki M, Figueiredo RB, Huang Y, Langdon TG (2014) Interpretation of hardness evolution in metals processed by high-pressure torsion. J Mater Sci 49:6586–6596. doi: 10.1007/s10853-014-8262-8 CrossRefGoogle Scholar
  18. 18.
    Lee DJ, Yoon EY, Park LJ, Kim HS (2012) The dead metal zone in high-pressure torsion. Scripta Mater 67:384–387CrossRefGoogle Scholar
  19. 19.
    Pereira PHR, Figueiredo RB, Cetlin PR, Langdon TG (2015) An examination of the elastic distortion of anvils in high-pressure torsion. Mater Sci Eng A 631:201–208CrossRefGoogle Scholar
  20. 20.
    Wang J, Kang S-B, Kim H-W, Horita Z (2002) Lamellae deformation and structural evolution in an Al–33% Cu eutectic alloy during equal-channel angular pressing. J Mater Sci 37:5223–5227. doi: 10.1023/A:1021048202055 CrossRefGoogle Scholar
  21. 21.
    Langdon TG (2009) Seventy-five years of superplasticity: historic developments and new opportunities. J Mater Sci 44:5998–6010. doi: 10.1007/s10853-009-3780-5 CrossRefGoogle Scholar
  22. 22.
    Langdon TG (1982) Fracture processes in superplastic flow. Metal Sci 16:175–183CrossRefGoogle Scholar
  23. 23.
    Chokshi AH, Langdon TG (1987) The activation energy for superplastic deformation in the Al–33% Cu eutectic alloy. Scripta Metall 21:1669–1673CrossRefGoogle Scholar
  24. 24.
    Chokshi AH, Langdon TG (1988) The mechanical properties of the superplastic Al–33 Pct Cu eutectic alloy. Metall Trans A 19A:2487–2496CrossRefGoogle Scholar
  25. 25.
    Chokshi AH, Langdon TG (1989) Cavitation and fracture in the superplastic Al–33% Cu eutectic alloy. J Mater Sci 24:143–153. doi: 10.1007/BF00660946 CrossRefGoogle Scholar
  26. 26.
    Chokshi AH, Langdon TG (1989) Superplasticity in Al-33Cu eutectic alloy in as extruded condition. Mater Sci Tech 5:435CrossRefGoogle Scholar
  27. 27.
    Kawasaki M, Langdon TG (2007) Principles of superplasticity in ultrafine-grained materials. J Mater Sci 42:1782–1796. doi: 10.1007/s10853-006-0954-2 CrossRefGoogle Scholar
  28. 28.
    Loucif A, Figueiredo RB, Baudin T, Brisset F, Langdon TG (2010) Microstructural evolution in an Al-6061 alloy processed by high-pressure torsion. Mater Sci Eng A527:4864–4869CrossRefGoogle Scholar
  29. 29.
    Sabbaghianrad S, Kawasaki M, Langdon TG (2012) Microstructural evolution and the mechanical properties of an aluminum alloy processed by high-pressure torsion. J Mater Sci 47:7789–7795. doi: 10.1007/s10853-012-6524-x CrossRefGoogle Scholar
  30. 30.
    El-Danaf E, Kawasaki M, El-Rayes M, Baig M, Ali Mohammed J, Langdon TG (2014) Mechanical properties and microstructure evolution in an aluminum 6082 alloy processed by high-pressure torsion. J Mater Sci 49:6597–6607. doi: 10.1007/s10853-014-8266-4 CrossRefGoogle Scholar
  31. 31.
    Wongsa-Ngam J, Kawasaki M, Langdon TG (2012) Achieving homogeneity in a Cu-Zr alloy processed by high-pressure torsion. J Mater Sci 47:7782–7788. doi: 10.1007/s10853-012-6587-8 CrossRefGoogle Scholar
  32. 32.
    Wongsa-Ngam J, Kawasaki M, Langdon TG (2013) A comparison of microstructures and mechanical properties in a Cu–Zr alloy processed using different SPD techniques. J Mater Sci 48:4653–4660. doi: 10.1007/s10853-012-7072-0 CrossRefGoogle Scholar
  33. 33.
    Khereddine AY, Hadj Larbi F, Azzeddine H, Baudin T, Brisset F, Helbert A-L, Mathon M-H, Kawasaki M, Bradai D, Langdon TG (2013) Microstructures and textures of a Cu–Ni–Si alloy processed by high-pressure torsion. J Alloys Compds 574:361–367CrossRefGoogle Scholar
  34. 34.
    Zhao YH, Guo YZ, Wei Q, Dangelewicz AM, Xu C, Zhu YT, Langdon TG, Zhou YZ, Lavernia EJ (2008) Influence of specimen dimensions on the tensile behavior of ultrafine-grained Cu. Scripta Mater 59:627–630CrossRefGoogle Scholar
  35. 35.
    Zhao YH, Guo YZ, Wei Q, Topping TD, Dangelewicz AM, Zhu YT, Langdon TG, Lavernia EJ (2009) Influence of specimen dimensions and strain measurement methods on tensile stress-strain curves. Mater Sci Eng A525:68–77CrossRefGoogle Scholar
  36. 36.
    Langdon TG (2006) Grain boundary sliding revisited: developments in sliding over four decades. J Mater Sci 41:597–609. doi: 10.1007/s10853-006-6476-0 CrossRefGoogle Scholar
  37. 37.
    Ishikawa H, Mohamed FA, Langdon TG (1975) The influence of strain rate on ductility in the Zn-22% Al eutectoid. Philos Mag 32:1269–1271CrossRefGoogle Scholar
  38. 38.
    Vorhauer A, Pippan R (2004) On the homogeneity of deformation by high pressure torsion. Scripta Mater 51:921–925CrossRefGoogle Scholar
  39. 39.
    Xu C, Horita Z, Langdon TG (2007) The evolution of homogeneity in processing by high-pressure torsion. Acta Mater 55:203–212CrossRefGoogle Scholar
  40. 40.
    Kawasaki M, Ahn B, Langdon TG (2010) Significance of strain reversals in a two-phase alloy processed by high-pressure torsion. Mater Sci Eng A527:7008–7016CrossRefGoogle Scholar
  41. 41.
    Xu C, Horita Z, Langdon TG (2007) The processing of ultrafine-grained materials using high-pressure torsion. Mater Sci Forum 558–559:1283–1294CrossRefGoogle Scholar
  42. 42.
    Harai Y, Ito Y, Horita Z (2008) High-pressure torsion using ring specimens. Scripta Mater 58:469–482CrossRefGoogle Scholar
  43. 43.
    Ito Y, Horita Z (2009) Microstructural evolution in pure aluminum processed by high-pressure torsion. Mater Sci Eng A503:32–36CrossRefGoogle Scholar
  44. 44.
    Xu C, Langdon TG (2009) Three-dimensional representations of hardness distributions after processing by high-pressure torsion. Mater Sci Eng A503:71–74CrossRefGoogle Scholar
  45. 45.
    Kawasaki M, Ahn B, Langdon TG (2010) Effect of strain reversals on the processing of high-purity aluminum by high-pressure torsion. J Mater Sci 45:4583–4593. doi: 10.1007/s10853-010-4420-9 CrossRefGoogle Scholar
  46. 46.
    Xu C, Horita Z, Langdon TG (2010) Microstructural evolution in pure aluminum in the early stages of processing by high-pressure torsion. Mater Trans 51:2–7CrossRefGoogle Scholar
  47. 47.
    Kawasaki M, Figueiredo RB, Langdon TG (2011) An investigation of hardness homogeneity throughout disks processed by high-pressure torsion. Acta Mater 59:308–316CrossRefGoogle Scholar
  48. 48.
    Kawasaki M, Figueiredo RB, Langdon TG (2012) Twenty-five years of severe plastic deformation: recent developments in evaluating the degree of homogeneity through the thickness of disks processed by high-pressure torsion. J Mater Sci 47:7719–7725. doi: 10.1007/s10853-012-6507-y CrossRefGoogle Scholar
  49. 49.
    Edalati K, Horita Z (2011) Significance of homologous temperature in softening behavior and grain size of pure metals processed by high-pressure torsion. Mater Sci Eng A528:7514–7523CrossRefGoogle Scholar
  50. 50.
    Edalati K, Yamamoto A, Horita Z, Ishihara T (2011) High-pressure torsion of pure magnesium: Evolution of mechanical properties, microstructures and hydrogen storage capacity with equivalent strain. Scripta Mater 64:880–883CrossRefGoogle Scholar
  51. 51.
    Kawasaki M, Ahn B, Langdon TG (2010) Microstructural evolution in a two-phase alloy processed by high-pressure torsion. Acta Mater 58:919–930CrossRefGoogle Scholar
  52. 52.
    Zhang NX, Kawasaki M, Huang Y, Langdon TG (2013) Microstructural evolution in two-phase alloys processed by high-pressure torsion. J Mater Sci 48:4582–4591. doi: 10.1007/s10853-012-7087-6 CrossRefGoogle Scholar
  53. 53.
    Cho T-S, Lee H-J, Ahn B, Kawasaki M, Langdon TG (2014) Microstructural evolution and mechanical properties in a Zn–Al eutectoid alloy processed by high-pressure torsion. Acta Mater 72:67–79CrossRefGoogle Scholar
  54. 54.
    Alhamidi A, Edalati K, Horita Z, Hirosawa S, Matsuda K, Terada D (2014) Softening by severe plastic deformation and hardening by annealing of aluminum–zinc alloy: significance of elemental and spinodal decompositions. Mater Sci Eng A610:17–27CrossRefGoogle Scholar
  55. 55.
    Song Y, Wang W, Gao D, Yoon EY, Lee DJ, Lee CS, Kim HS (2013) Hardness and microstructure of interstitial free steels in the early stage of high-pressure torsion. J Mater Sci 48:4698–4704. doi: 10.1007/s10853-012-7031-9 CrossRefGoogle Scholar
  56. 56.
    Cao Y, Wang YB, Figueiredo RB, Chang L, Liao XZ, Kawasaki M, Zheng WL, Ringer SP, Langdon TG, Zhu YT (2011) Three-dimensional shear-strain patterns induced by high-pressure torsion and their impact on hardness evolution. Acta Mater 59:3903–3914CrossRefGoogle Scholar
  57. 57.
    Matoso MS, Figueiredo RB, Kawasaki M, Santos DB, Langdon TG (2013) Processing a twinning-induced plasticity steel by high-pressure torsion. Scripta Mater 67:649–652CrossRefGoogle Scholar
  58. 58.
    Jeong HJ, Yoon EY, Lee DJ, Kim NJ, Lee S, Kim HS (2012) Nanoindentation analysis for local properties of ultrafine grained copper processed by high pressure torsion. J Mater Sci 47:7828–7834. doi: 10.1007/s10853-012-6540-x CrossRefGoogle Scholar
  59. 59.
    Hegedűs Z, Gubicza J, Kawasaki M, Chinh NQ, Lábár JL, Langdon TG (2013) Stability of the ultrafine-grained microstructure in silver processed by ECAP and HPT. J Mater Sci 48:4637–4645. doi: 10.1007/s10853-012-7124-5 CrossRefGoogle Scholar
  60. 60.
    Figueiredo RB, Langdon TG (2011) Development of structural heterogeneities in a magnesium alloy processed by high-pressure torsion. Mater Sci Eng A528:4500–4506CrossRefGoogle Scholar
  61. 61.
    Figueiredo RB, Aguilar MTP, Cetlin PR, Langdon TG (2011) Deformation heterogeneity on the cross-sectional planes of a magnesium alloy processed by high-pressure torsion. Metall Mater Trans A 42A:3013–3021CrossRefGoogle Scholar
  62. 62.
    Al-Zubaydi A, Figueiredo RB, Huang Y, Langdon TG (2013) Structural and hardness inhomogeneities in Mg–Al–Zn alloys processed by high-pressure torsion. J Mater Sci 48:4661–4670. doi: 10.1007/s10853-013-7176-1 CrossRefGoogle Scholar
  63. 63.
    Nakai M, Niinomi M, Hieda J, Yilmazer H, Todaka Y (2013) Heterogeneous grain refinement of biomedical Ti–29Nb–13Ta–4.6Zr alloy through high-pressure torsion. Sci Iran 20:1067–1070Google Scholar
  64. 64.
    Sakai G, Nakamura K, Horita Z, Langdon TG (2005) Developing high-pressure torsion for use with bulk samples. Mater Sci Eng A406:268–273CrossRefGoogle Scholar
  65. 65.
    Hohenwarter A, Bachmaier A, Gludovatz B, Scheriau S, Pippan R (2009) Technical parameters affecting grain refinement by high pressure torsion. Int J Mater Res 100:1653–1661CrossRefGoogle Scholar
  66. 66.
    Figueiredo RB, Aguilar MTP, Cetlin PR, Langdon TG (2012) Analysis of plastic flow during high-pressure torsion. J Mater Sci 47:7807–7814. doi: 10.1007/s10853-012-6506-z CrossRefGoogle Scholar
  67. 67.
    Kawasaki M, Langdon TG (2013) The many facets of deformation mechanism mapping and the application to nanostructured materials. J Mater Res 28:1827–1834CrossRefGoogle Scholar
  68. 68.
    Langdon TG (2002) Creep at low stresses: An evaluation of diffusion creep and Harper-Dorn creep as viable creep mechanisms. Metall Mater Trans A 33A:249–259CrossRefGoogle Scholar
  69. 69.
    Langdon TG (1994) A unified approach to grain boundary sliding in creep and superplasticity. Acta Metall Mater 42:2437–2443CrossRefGoogle Scholar
  70. 70.
    Kawasaki M, Balasubramanian N, Langdon TG (2011) Flow mechanisms in ultrafine-grained metals with an emphasis on superplasticity. Mater Sci Eng, A 528:6624–6629CrossRefGoogle Scholar
  71. 71.
    Nabarro FRN (1948) Report of a Conference on Strength of Solids. The Physical Society, London, p 75Google Scholar
  72. 72.
    Herring C (1950) Diffusional viscosity of a polycrystalline solid. J Appl Phys 21:437–444CrossRefGoogle Scholar
  73. 73.
    Coble RL (1963) A model for boundary diffusion controlled creep in polycrystalline materials. J Appl Phys 34:1679–1681CrossRefGoogle Scholar
  74. 74.
    Rai G, Grant NJ (1975) On the measurements of superplasticity in an Al-Cu alloy. Metall Trans A 6A:385–390CrossRefGoogle Scholar
  75. 75.
    Mohamed FA, Langdon TG (1975) Creep at low stress levels in the superplastic Zn-22% Al eutectoid. Acta Metall 23:117–124CrossRefGoogle Scholar
  76. 76.
    Mohamed FA, Langdon TG (1975) Creep behaviour in the superplastic Pb–62% Sn eutectic. Phil Mag 32:697–709CrossRefGoogle Scholar
  77. 77.
    Mohamed FA, Langdon TG (1976) Deformation mechanism maps for superplastic materials. Scripta Metall 10:759–762CrossRefGoogle Scholar
  78. 78.
    Kawasaki M, Lee S, Langdon TG (2009) Constructing a deformation mechanism map for a superplastic Pb–Sn alloy processed by equal-channel angular pressing. Scripta Mater 61:963–966CrossRefGoogle Scholar
  79. 79.
    Kawasaki M, Mendes Ade A, Sordi VL, Ferrante M, Langdon TG (2011) Achieving superplastic properties in a Pb–Sn eutectic alloy processed by equal-channel angular pressing. J Mater Sci 46:155–160. doi: 10.1007/s10853-010-4889-2 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Megumi Kawasaki
    • 1
    • 2
    Email author
  • Han-Joo Lee
    • 1
  • Terence G. Langdon
    • 2
    • 3
  1. 1.Division of Materials Science and EngineeringHanyang UniversitySeoulSouth Korea
  2. 2.Departments of Aerospace & Mechanical Engineering and Materials ScienceUniversity of Southern CaliforniaLos AngelesUSA
  3. 3.Materials Research Group, Faculty of Engineering and the EnvironmentUniversity of SouthamptonSouthamptonUK

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