Genesis of Defects in Massively Transformed L10-ordered τ-MnAl Alloys

MRS Online Proceedings Library volume 652, Article number: 83 (2000) Cite this article

Abstract

Defects produced in massively transformed L10-ordered t-MnAl have been characterized by detailed TEM studies. The defect population in massive t-MnAl comprises arrays of overlapping stacking faults, {111}-conjugated microtwins, thermal antiphase boundaries and dislocations. The genesis of these defects has been attributed to atomic attachment faulting on {111}- and {020}-type facets of the essentially incoherent growth interface between the parent and product phases. The features of the defect genesis in t-MnAl are discussed with respect to the role of atomic level processes at solid-state transformation interfaces in general and growth interfaces in massively transforming materials systems in particular.

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References

  1. 1.

    C. Muller, et al., Z. Metallkd, 87, 594 (1996)

    Google Scholar 

  2. 2.

    D.P. Hoydick, E.J. Palmiere, and W.A. Soffa, Scripta Mater, 36, 151 (1997)

    CAS  Article  Google Scholar 

  3. 3.

    N.I. Vlasova, et al., Phys. Met. Metall, 51, 1 (1981)

    Google Scholar 

  4. 4.

    C. Yanar, et al., Microscopy and Microanalysis, 6, 364 (2000)

    Article  Google Scholar 

  5. 5.

    C. Yanar, J.M.K. Wiezorek, and W.A. Soffa, Phase Transformations and Evolution in Materials, 39–54, edited by P. Turchi and A. Gonis, Warrendale, PA, TMS (2000)

  6. 6.

    M. Kumar, et al., Mat. Res. Soc. Symp., p. KK8.19.1 (1999)

    Google Scholar 

  7. 7.

    M. Yamaguchi and Y. Umakoshi, Prog. in Mat. Sci., 31, 1 (1990)

    CAS  Article  Google Scholar 

  8. 8.

    P. Wang, G.B. Viswanathan, and V.K. Vasudevan, Metall. Trans., 23A, 690 (1992)

    CAS  Article  Google Scholar 

  9. 9.

    P. Wang, et al., Acta Mater, 46, 13 (1998)

    CAS  Article  Google Scholar 

  10. 10.

    X.D. Zhang, et al., Phil. Mag. Lett., 79, 519 (1999)

    CAS  Article  Google Scholar 

  11. 11.

    S. Mahajan, et al., Acta Mater., 45, 2633,(1997).

    CAS  Article  Google Scholar 

Download references

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Affiliations

  1. Department of Materials Science and Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA

    Cagatay Yanar, Velimir Radmilovic & William A. Soffa

  2. National Center for Electron Microscopy, LBNL, Berkeley, CA, USA

    Cagatay Yanar

  3. Department of Physical Metallurgy, University of Belgrade, 11001, Belgrade, Yugoslavia

    Jorg M. K. Wiezorek

Authors
  1. Cagatay Yanar
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  2. Velimir Radmilovic
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  3. William A. Soffa
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  4. Jorg M. K. Wiezorek
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Correspondence to Cagatay Yanar.

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Yanar, C., Radmilovic, V., Soffa, W.A. et al. Genesis of Defects in Massively Transformed L10-ordered τ-MnAl Alloys. MRS Online Proceedings Library 652, 83 (2000). https://doi.org/10.1557/PROC-652-Y8.3

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