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. SheinermanEmail author
  • R. Z. Valiev
Ultrafinegrained Materials


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.


Severe Plastic Deformation Edge Dislocation Misorientation Angle Atomic Probe Tomography Tilt Boundary 
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.



The work was supported, in part, (for I.A.O. and R.Z.V.) by the Russian Ministry of Education and Science (Grant 14.B25.31.0017) and (for A.G.S.) by St. Petersburg State University research grant 6.37.671.2013. The authors would also like to thank Dr. N.A. Enikeev for fruitful discussions.


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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
    Email author
  • 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

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