Achieving Forced Mixing in Cu-Based Immiscible Alloys via Friction Stir Processing

  • Mageshwari KomarasamyEmail author
  • Ryan Tharp
  • Subhasis Sinha
  • Saket Thapliyal
  • Rajiv Mishra
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Cu-based binary and ternary immiscible alloys were synthesized from elemental powders via friction stir processing (FSP) as a pathway to obtain thermally stable bulk nanostructured alloys with forced miscibility. The processed alloys were characterized using scanning electron microscopy (SEM). High magnification SEM confirmed the formation of forced mixing in the friction stir processed layer. Forced miscibility in immiscible alloys systems was possible due to high temperature intense severe plastic deformation during FSP. Mixing characteristics in Cu–Ag–Nb and Cu–Fe immiscible alloys were carried out and a mixing mechanism was proposed. As-processed alloys exhibited hardness in the range of 215–320 HV0.3.


Immiscible alloys Friction stir processing Forced mixing Microstructural evolution Hardness 



Authors acknowledge the help of Maya Duffy and Smruthi Senthil in sample preparation. Authors also acknowledge Material Research Facility (MRF) at University of North Texas for the microscopy facilities.


  1. 1.
    Gleiter H (1989) Nanocrystalline materials. Prog Mater Sci 33:223–315CrossRefGoogle Scholar
  2. 2.
    Meyers MA, Mishra A, Benson DJ (2006) Mechanical properties of nanocrystalline materials. Prog Mater Sci 51(4):427–556CrossRefGoogle Scholar
  3. 3.
    Tschopp MA, Murdoch HA, Kecskes LJ, Darling KA (2014) Bulk nanocrystalline metals: review of the current state of the art and future opportunities for copper and copper alloys. JOM 66(6):1000–1019CrossRefGoogle Scholar
  4. 4.
    Gertsman VY, Birringer R (1994) On the room-temperature grain growth in nanocrystalline copper. Scr Metall Mater 30(5):577–581CrossRefGoogle Scholar
  5. 5.
    Boyce BL, Padilla HA (2011) Anomalous fatigue behavior and fatigue-induced grain growth in nanocrystalline nickel alloys. Metall Mater Trans A Phys Metall. Mater Sci 42(7):1793–1804Google Scholar
  6. 6.
    Suryanarayana C (2001) Mechanical alloying and milling. Prog Mater Sci 46(1–2):1–184CrossRefGoogle Scholar
  7. 7.
    Ma E (2005) Alloys created between immiscible elements. Prog Mater Sci 50(4):413–509CrossRefGoogle Scholar
  8. 8.
    Darling KA, Rajagopalan M, Komarasamy M, Bhatia MA, Hornbuckle BC, Mishra RS, Solanki KN (2016) Extreme creep resistance in a microstructurally stable nanocrystalline alloy. Nature 537:378–381CrossRefGoogle Scholar
  9. 9.
    Vo NQ, Zhou J, Ashkenazy Y, Schwen D, Averback RS, Bellon P (2013) Atomic mixing in metals under shear deformation. JOM 65(3):382–389CrossRefGoogle Scholar
  10. 10.
    Ashkenazy Y, Vo NQ, Schwen D, Averback RS, Bellon P (2012) Shear induced chemical mixing in heterogeneous systems. Acta Mater 60(3):984–993CrossRefGoogle Scholar
  11. 11.
    Odunuga S, Li Y, Krasnochtchekov P, Bellon P, Averback RS (2005) Forced chemical mixing in alloys driven by plastic deformation. Phys Rev Lett 95(4):93–96CrossRefGoogle Scholar
  12. 12.
    Botcharova E, Freudenberger J, Schultz L (2004) Mechanical alloying of copper with niobium and molybdenum. J Mater Sci 39(16–17):5287–5290CrossRefGoogle Scholar
  13. 13.
    Mishra RS, Ma ZY (2005) Friction stir welding and processing. Mater Sci Eng R Rep 50(1–2):1–78CrossRefGoogle Scholar
  14. 14.
    Mishra RS, De PS, Kumar N (2014) Friction stir welding and processing. Springer International Publishing, SwitzerlandCrossRefGoogle Scholar
  15. 15.
    Mageshwari K, Mishra RS, Mukherjee S, Young ML (2015) Friction stir-processed thermally stable immiscible nanostructured alloys. JOM 67(12):2820–2827CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Mageshwari Komarasamy
    • 1
    Email author
  • Ryan Tharp
    • 1
  • Subhasis Sinha
    • 1
  • Saket Thapliyal
    • 1
  • Rajiv Mishra
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringCenter for Friction Stir Processing, University of North TexasDentonUSA
  2. 2.Department of Materials Science and EngineeringCenter for Friction Stir Processing, Advanced Materials and Manufacturing Processes Institute, University of North TexasDentonUSA

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