Advertisement

Particle Hardening in Creep-Resistant Mg-Alloy MRI 230D Probed by Nanoindenting Atomic Force Microscopy

  • Björn Backes
  • Karsten Durst
  • Dorothea AmbergerEmail author
  • Mathias Göken
Communication

Abstract

Two different Mg alloys, AZ91 and MRI 230D, have been investigated with the objective to understand the differences in high-temperature deformation behavior. AZ91 is known for its rather poor creep resistance; in contrast to this, MRI 230D is known to have a rather high resistance against plastic deformation at elevated temperatures. The microstructure and mechanical properties of as-cast and crept specimens of two Mg alloys (AZ91 and MRI 230D) were characterized by nanoindenting atomic force microscopy (NI-AFM). In the cell interior, a significant higher hardness was found for MRI 230D in comparison to AZ91. Precipitates with an average size of about 50 nm found in the cell interior of MRI 230D after creep deformation are discussed as the major hardening component.

Keywords

Atomic Force Microscopy Intermetallic Phase Indentation Depth Creep Deformation Cell Interior 
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

The authors gratefully acknowledge the financial support of the Deutsche Forschungsgemeinschaft (DFG) under Contact No. GO 741/9-2. The supply with the die cast MRI 230D alloy and the permission to publish the creep data from Audi AG, Ingolstadt is gratefully acknowledged.

References

  1. 1.
    M.O. Pekguleryuz, E. Baril: Mater. Trans., 2001, vol. 42, pp. 1258–67CrossRefGoogle Scholar
  2. 2.
    B.L. Mordike, T. Ebert: Mater. Sci. Eng., 2001, vol. A302, pp. 37–45Google Scholar
  3. 3.
    W. Blum, B. Watzinger, P. Zhang: Adv. Eng. Mater., 2000, vol. 6, pp. 349–55CrossRefGoogle Scholar
  4. 4.
    D. Regener, E. Schick, H. Heyse: Mat.-wiss. u. Werkstofftech., 2003, vol. 34, pp. 721–28CrossRefGoogle Scholar
  5. 5.
    A.A. Luo: Mater. Sci. Forum, 2003, vols. 419–422, pp. 57–66CrossRefGoogle Scholar
  6. 6.
    M.S. Yoo, K.S. Shin, N.J. Kim: Metall. Mater. Trans. A, 2004, vol. 35A, pp. 1629–32CrossRefADSGoogle Scholar
  7. 7.
    S. Celotto: Acta Mater., 2000, vol. 48, pp. 1775–87CrossRefGoogle Scholar
  8. 8.
    B. Bronfin, E. Aghion, S. Schumann, H. Friedrich, and F. von Buch: Proc. 6th Int. Conf. on Magnesium Alloys and Their Applications, K.U. Kainer, ed., Wiley VCH, Weinheim, 2004, pp. 55–61Google Scholar
  9. 9.
    B. Backes, K. Durst, W. Blum, and M. Göken: Praktische Metallographie Sonderband 37, Metallographietagung Erlangen 2005, M. Göken, ed., Werkstoffinformations-gesellschaft mbH, Frankfurt, 2005, pp. 59–64Google Scholar
  10. 10.
    M.O. Pekguleryuz, A.A. Kaya: Adv. Eng. Mater., 2003, vol. 5, pp. 866–78CrossRefGoogle Scholar
  11. 11.
    A. Müller, D. Heger: Prakt. Met., 1991, vol. 36, pp. 305–12Google Scholar
  12. 12.
    W.C. Oliver, G.M. Pharr: J. Mater. Res., 1992, vol. 7, pp. 1564–83CrossRefADSGoogle Scholar
  13. 13.
    T. Schöberl, H.S. Gupta, P. Fratzl: Mater. Sci. Eng. A, 2003, vol. 363, pp. 211–20CrossRefGoogle Scholar
  14. 14.
    K. Durst, M. Göken, H. Vehoff: J. Mater. Res., 2004, vol. 19, pp. 85–93ADSGoogle Scholar
  15. 15.
    H.J. Frost, M.F. Ashby: Deformation Mechanism Maps, Pergamon Press, Oxford, United Kingdom, 1982Google Scholar
  16. 16.
    W. Blum, Y.J. Li, X.H. Zeng, B. von Großmann, C. Haberling: Metall. Mater. Trans. A, 2005, vol. 36A, pp. 1721–28CrossRefADSGoogle Scholar
  17. 17.
    A. Suzuki, N.D. Saddock, J.W. Jones, T.M. Pollock: Acta Mater., 2005, vol. 53, pp. 2823–34CrossRefGoogle Scholar
  18. 18.
    A. Suzuki, N.D. Saddock, J.R. TerBush, B.R. Powell, J.W. Jones, and T.M. Pollock: Metall. Mater. Trans. A, 2008, vol. 39A, pp. 696–702Google Scholar
  19. 19.
    K. Durst, B. Backes, M. Göken: Scripta Mater., 2005, vol. 52 (11), pp. 1093–97CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2008

Authors and Affiliations

  • Björn Backes
    • 1
  • Karsten Durst
    • 1
  • Dorothea Amberger
    • 1
    Email author
  • Mathias Göken
    • 1
  1. 1.Institut für Werkstoffwissenschaften, LS 1Universität Erlangen-NürnbergErlangenGermany

Personalised recommendations