Evolution of the Intermetallic Particle Distribution in Thixomolded Magnesium Alloys

  • B. T. Anthony
  • B. G. Dowdell
  • V. M. MillerEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


The spatial distribution of intermetallic particles in magnesium alloys is critical to achieve a favorable combination of mechanical properties. The initial microstructure of Thixomolded alloys, with a fine homogeneous grain structure and intermetallic particle distribution, results in particularly favorable behavior. However, the as-molded microstructure is far from equilibrium. In this manuscript, the Thixomolded structure is characterized before and after heat treatment using electron microscopy.


Thixomolding Heat treatment Intermetallic particles 



The authors would like to thank Dr. Ray Decker and nanoMAG, LLC for providing the material used in this study. This work was performed in part at the Analytical Instrumentation Facility (AIF) at North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation (award number ECCS-1542015). The AIF is a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), a site in the National Nanotechnology Coordinated Infrastructure (NNCI).


  1. 1.
    J.-F. Nie: Metallurgical and Materials Transactions A, 2012, vol. 43(11): 3891–3939, 00477.CrossRefGoogle Scholar
  2. 2.
    J. M. Rosalie, H. Somekawa, A. Singh, and T. Mukai: Materials Science and Engineering: A, 2012, vol. 539: 230–237, 00030.CrossRefGoogle Scholar
  3. 3.
    J. Nie: Scripta Materialia, 2003, vol. 48: 1009–1015.Google Scholar
  4. 4.
    J. Robson, N. Stanford, and M. Barnett: Acta Materialia, 2011, vol. 59(5): 1945–1956.CrossRefGoogle Scholar
  5. 5.
    F. Wang, J. J. Bhattacharyya, and S. R. Agnew: Materials Science and Engineering: A, 2016, vol. 666: 114–122, 00020.CrossRefGoogle Scholar
  6. 6.
    F. Humphreys and M. Hatherly: Recrystallization and Related Annealing Phenomena, Pergamon, Oxford, 2004.CrossRefGoogle Scholar
  7. 7.
    J. Robson, D. Henry, and B. Davis: Acta Materialia, 2009, vol. 57(9): 2739–2747.CrossRefGoogle Scholar
  8. 8.
    E. Ball and P. Prangnell: Scripta Metallurgica et Materialia, 1994, vol. 31(2): 111–116.Google Scholar
  9. 9.
    T. Al-Samman and X. Li: Materials Science and Engineering: A, 2011, vol. 528(10–11): 3809–3822.CrossRefGoogle Scholar
  10. 10.
    J. W. Senn and S. R. Agnew: in M. O. Pekguleryuz, N. R. Neelameggham, R. S. Beals, and E. A. Nyberg (eds.), Magnesium Technology, TMS (The Minerals, Metals & Materials Society), 2008 pp. 153–158.Google Scholar
  11. 11.
    V. M. Miller and T. M. Pollock: Magnesium Technology 2013, 2013, pp. 203–209.CrossRefGoogle Scholar
  12. 12.
    D. Guan, W. M. Rainforth, J. Gao, J. Sharp, B. Wynne, and L. Ma: Acta Materialia, 2017, vol. 135: 14–24, 00007.CrossRefGoogle Scholar
  13. 13.
    A. Singh, D. A. Basha, H. Somekawa, and K. Tsuchiya: Scripta Materialia, 2017, vol. 134: 80–84, 00007.Google Scholar
  14. 14.
    Z. Li, J. Dong, X. Q. Zeng, C. Lu, and W. J. Ding: Materials Science and Engineering: A, 2007, vol. 466(1–2): 134–139.CrossRefGoogle Scholar
  15. 15.
    V. M. Miller and T. M. Pollock: Metallurgical and Materials Transactions A, 2016, vol. 47(4): 1854–1864.CrossRefGoogle Scholar
  16. 16.
    T. D. Berman, W. Donlon, V. M. Miller, R. Decker, J. Huang, T. M. Pollock, and J. W. Jones: Magnesium Technology 2012 w/CD, 2012, p. 339.Google Scholar
  17. 17.
    R. Decker, S. LeBeau, T. Berman, T. Miller, J. Wayne Jones, T. Pollock, N. Moskovich, and B. Bronfin: in K. N. Solanki, D. Orlov, A. Singh, and N. R. Neelameggham (eds.), Magnesium Technology 2017, Springer International Publishing, The Minerals, Metals & Materials Series, 2017 pp. 235–243, 00000.Google Scholar
  18. 18.
    F. Bachmann, R. Hielscher, and H. Schaeben: Solid State Phenomena, 2010, vol. 160: 63–68.CrossRefGoogle Scholar
  19. 19.
    Pandat with PanMagneisum database, Computherm, LLC, 2008.Google Scholar
  20. 20.
    T. D. Berman, T. M. Pollock, and J. W. Jones: Metallurgical and Materials Transactions A, 2016, vol. 47(6): 3125–3136.CrossRefGoogle Scholar
  21. 21.
    T. D. Berman, T. M. Pollock, and J. W. Jones: Metallurgical and Materials Transactions A, 2015, vol. 46(7): 2986–2998.CrossRefGoogle Scholar
  22. 22.
    T. D. Berman, W. Donlon, C. Hung, P. Milligan, R. Decker, T. M. Pollock, and J. W. Jones: in Magnesium Technology 2013, TMS (The Minerals, Metals & Materials Society), 2013 p. 113.Google Scholar
  23. 23.
    T. D. Berman: Microstructure Evolution and Tensile Deformation in Mg Alloy AZ61 Through Thixomolding and Thermomechanical Processing, Doctoral Thesis, University of Michigan, Ann Arbor, 2014.Google Scholar
  24. 24.
    V. M. Miller: Texture Evolution during Thermomechanical Processing in Rare Earth Free Magnesium Alloys, PhD dissertation, University of California Santa Barbara, Santa Barbara, CA, 2016.Google Scholar
  25. 25.
    B. Kondori, T. F. Morgeneyer, L. Helfen, and A. A. Benzerga: Acta Materialia, 2018, vol. 155: 80–94, 00000.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringNorth Carolina State UniversityRaleighUSA

Personalised recommendations