Surface Energies of Planar Defects and Dislocation Processes in Al3Ti and Tial

Abstract

Information on APB energy in ordered alloys is important not only to understand their mechanical properties but also to analyse conditions for phase transformation. APB surface energies are determined from dissociation distances of superdislocations both in TiAl and Al3Ti Medium and high APB energy anisotropies are found in TiAl and Al3Ti respectively. These results are consistent with phase diagram studies which predict that the APB energy vanishes in the (001) plane near the Al3Ti composition. Examples of decompositions of perfect dislocations into perfect dislocations are discussed.

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References

  1. [1].

    P. A. FLINN, Trans. Met. Soc. A.I.M.E., 218 (1960) 145.

  2. [2].

    B. H. KEAR and H. G. F. WlLSDORF, Trans. T.M.S.-A.I.M.E., 224 (1962) 382.

  3. [3].

    J. DOUIN, P. BEAUCHAMP, and P. VEYSSIERE, Phil. Mag. A, 54 (1986) 375.

  4. [4].

    A. KORNER, Phil. Mag., A, 58 (1988) 507.

  5. [5].

    P. BEAUCHAMP, J. DOUIN and P. VEYSSIERE, Phil. Mag. A, 55 (1987) 565.

  6. [6].

    A. LASALMONIE, B. CHENAL, G. HUG and P. BEAUCHAMP, Phil. Mag. A, 58 (1988) 543.

  7. [7].

    V. PAIDAR, D. V. POPE, and V. VITEK, Acta Met., 32, 3 (1984) 435.

  8. [8].

    A.LOISEAU

  9. [9].

    K. S. KUMAR and J. R. PICKEUS, in Proc. “Dispersion Strengthened Aluminium Alloys”, TMS Meeting (1988) Phoenix, Arizona.

  10. [10].

    T. KAWABATA, T. KANAI and O. IZUMI, Acta Met., 33 (1985) 1355.

  11. [11].

    G. HUG, A. LOISEAU and P. VEYSSIERE, Phil. Mag. A, 57 (1988) 499.

  12. [12].

    J. KANAMORI and Y. KAKEHASHI, J. Physique, 38, C7 (1977) 274.

  13. [13].

    M. J. Marcinkowski, N. Brown and R. M. Fisher, Acta Met., 9 (1961) 129.

  14. [14].

    G. VANDERSCHAEVE, PhD thesis, University of Lille (France), 1981.

  15. [15].

    HUG G., 1988, PhD thesis, University of Orsay (France), 1988.

  16. [16].

    M. H. YOO, Scripta Met., 20 (1986) 915.

  17. [17].

    M.YAMAGUCH1 and Y.SHIRAI, in Proc. “Dispersion Strengthened Aluminium Alloys”, TMS Meeting (1988) Phoenix, Arizona.

  18. [18].

    B. A. GREENBERG, Phys. Stat. Sol., 42 (1970) 459; Phys. Stat. Sol. (b), 55 (1973) 59.

  19. [19].

    G. HUG, A. LOISEAU and A. LASALMONIE, Phil. Mag. A, 54, (1986) 47.

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Hug, G., Douin, J. & Veyssiere, P. Surface Energies of Planar Defects and Dislocation Processes in Al3Ti and Tial. MRS Online Proceedings Library 133, 125 (1988). https://doi.org/10.1557/PROC-133-125

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