Journal of Materials Science

, Volume 49, Issue 19, pp 6682–6688 | Cite as

Mg segregations at and near deformation-distorted grain boundaries in ultrafine-grained Al–Mg alloys

  • I. A. Ovid’ko
  • A. G. Sheinerman
  • R. Z. Valiev
Ultrafinegrained Materials

Abstract

The formation of Mg segregations at and near deformation-distorted grain boundaries (GBs) in ultrafine-grained Al–Mg alloys is theoretically described as a process enhanced by stress fields of extrinsic dislocations existing at such GBs. The equilibrium Mg concentration profiles near low-angle and high-angle GBs containing extrinsic dislocations are calculated. The results of the calculations explain the experimental observations (reported in the scientific literature) of spatially inhomogeneous Mg segregations characterized by high Mg concentrations at and near GBs in ultrafine-grained Al–Mg alloys processed by severe plastic deformation.

References

  1. 1.
    Koch CC (2007) Structural nanocrystalline materials: an overview. J Mater Sci 42:1403–1414. doi:10.1007/s10853-006-0609-3 CrossRefGoogle Scholar
  2. 2.
    Ovid’ko IA (2007) Review on the fracture processes in nanocrystalline materials. J Mater Sci 42:1694–1708. doi:10.1007/s10853-006-0968-9 CrossRefGoogle Scholar
  3. 3.
    Zhu YT, Liao XZ, Wu XL (2012) Deformation twinning in nanocrystalline materials. Prog Mater Sci 57:1–62CrossRefGoogle Scholar
  4. 4.
    Kommel L, Kimmari E, Saarna M, Viljus M (2013) Processing and properties of bulk ultrafine-grained pure niobium. J Mater Sci 48:4723–4729. doi:10.1007/s10853-013-7210-3 CrossRefGoogle Scholar
  5. 5.
    Wang CT, Gao N, Gee MG, Wood RJK, Langdon TG (2013) Tribology testing of ultrafine-grained Ti processed by high-pressure torsion with subsequent coating. J Mater Sci 48:4742–4748. doi:10.1007/s10853-012-7110-y CrossRefGoogle Scholar
  6. 6.
    Song M, Zhu R, Foley DC, Sun C, Chen Y, Hartwig KT, Zhang X (2013) Enhancement of strength and ductility in ultrafine-grained T91 steel through thermomechanical treatments. J Mater Sci 48:7360–7373. doi:10.1007/s10853-013-7522-3 CrossRefGoogle Scholar
  7. 7.
    Wegner M, Leuthold J, Peterlechner M, Setman D, Zehetbauer M, Pippan R, Divinski SV, Wilde G (2013) Percolating porosity in ultrafine grained copper processed by high pressure torsion. J Appl Phys 114:183509CrossRefGoogle Scholar
  8. 8.
    Kawasaki M (2014) Different models of hardness evolution in ultrafine-grained materials processed by high-pressure torsion. J Mater Sci 49:18–43. doi:10.1007/s10853-013-7687-9 CrossRefGoogle Scholar
  9. 9.
    Lejček P (2013) Effect of solute interaction on interfacial segregation and grain boundary embrittlement in binary alloys. J Mater Sci 48:2574–2580. doi:10.1007/s10853-012-7048-0 CrossRefGoogle Scholar
  10. 10.
    Wang YB, Liao XZ, Zhao YH, Cooley JC, Horita Z, Zhu YT (2013) Elemental separation in nanocrystalline Cu-Al alloys. Appl Phys Lett 102:231912CrossRefGoogle Scholar
  11. 11.
    Lohmiller J, Kobler A, Spolenak R, Gruber PA (2013) The effect of solute segregation on strain localization in nanocrystalline thin films: dislocation glide vs. grain-boundary mediated plasticity. Appl Phys Lett 102:241916CrossRefGoogle Scholar
  12. 12.
    Andrievskii RA (2014) Review of thermal stability of nanomaterials. J Mater Sci 49:1449–1460. doi:10.1007/s10853-013-7836-1 CrossRefGoogle Scholar
  13. 13.
    Liddicoat PV, Liao XZ, Zhao Y, Zhu Y, Murashkin MY, Lavernia EJ, Valiev RZ, Ringer SP (2010) Nanostructural hierarchy increases the strength of aluminium alloys. Nat Commun 1:63CrossRefGoogle Scholar
  14. 14.
    Valiev RZ, Enikeev NA, Murashkin MY, Kazykhanov VU, Sauvage X (2010) On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation. Scr Mater 63:949–952CrossRefGoogle Scholar
  15. 15.
    Sauvage X, Ganeev A, Ivanisenko Y, Enikeev N, Murashkin M, Valiev RZ (2012) Grain boundary segregation in ufg alloys processed by severe plastic deformation. Adv Eng Mater 14:968–974CrossRefGoogle Scholar
  16. 16.
    Liu MP, Roven HJ, Murashkin MY, Valiev RZ, Kilmametov A, Zhang Z, Yu Y (2013) Structure and mechanical properties of nanostructured Al–Mg alloys processed by severe plastic deformation. J Mater Sci 48:4681–4688. doi:10.1007/s10853-012-7133-4 CrossRefGoogle Scholar
  17. 17.
    Valiev RZ, Murashkin MY, Ganeev AV, Enikeev NA (2012) Superstrength of nanostructured metals and alloys produced by severe plastic deformation. Phys Met Metallogr 113:1193–1201CrossRefGoogle Scholar
  18. 18.
    Valiev RZ, Islamgaliev RK, Alexandrov IV (2000) Bulk nanostructured materials from severe plastic deformation. Prog Mater Sci 45:103–189CrossRefGoogle Scholar
  19. 19.
    Sauvage X, Enikeev N, Valiev R, Nasedkina Y, Murashkin M (2014) Atomic-scale analysis of the segregation and precipitation mechanisms in a severely deformed Al–Mg alloy. Acta Mater 72:125–136CrossRefGoogle Scholar
  20. 20.
    Lojkowski W, Fecht H (2000) The structure of intercrystalline interfaces. Prog Mater Sci 45:339–568CrossRefGoogle Scholar
  21. 21.
    Ovid’ko IA, Sheinerman AG, Valiev RZ (2014) Dislocation emission from deformation-distorted grain boundaries in ultrafine-grained materials. Scr Mater 76:45–48CrossRefGoogle Scholar
  22. 22.
    Hirth JP, Lothe J (1982) Theory of dislocations. Wiley, New York, p 511Google Scholar
  23. 23.
    Hatch JE (ed) (1984) Aluminum: properties and physical metallurgy. ASM International, Metals Park, p 29Google Scholar
  24. 24.
    Kim YM, Lee B-J, Baskes MI (2006) Modified embedded-atom method interatomic potentials for Ti and Zr. Phys Rev B 74:014101CrossRefGoogle Scholar
  25. 25.
    Gupta CK (2003) Chemical metallurgy: principles and practice. Wiley, Weinheim, p 278CrossRefGoogle Scholar
  26. 26.
    Hu SY, Chen LQ (2001) Solute segregation and coherent nucleation and growth near a dislocation—a phase-field model integrating defect and phase microstructures. Acta Mater 49:463–472CrossRefGoogle Scholar
  27. 27.
    Heo TW, Battacharyya S, Chen LQ (2011) A phase field study of strain energy effects on solute–grain boundary interactions. Acta Mater 59:7800–7815CrossRefGoogle Scholar
  28. 28.
    Friedel J (1954) Electronic structure of primary solid solutions in metals. Adv Phys 3:446–507CrossRefGoogle Scholar
  29. 29.
    Jelinek B, Houze J, Kim S, Horstemeyer MF, Baskes MI, Kim SG (2007) Modified embedded-atom method interatomic potentials for the Mg-Al alloy system. Phys Rev B 75:054106CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • I. A. Ovid’ko
    • 1
    • 2
    • 3
  • A. G. Sheinerman
    • 1
    • 2
    • 3
  • R. Z. Valiev
    • 1
    • 4
  1. 1.Department of Mathematics and MechanicsSt. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Institute of Problems of Mechanical EngineeringRussian Academy of SciencesSt. PetersburgRussia
  3. 3.St. Petersburg State Polytechnical UniversitySt. PetersburgRussia
  4. 4.Ufa State Aviation Technical UniversityUfaRussia

Personalised recommendations