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Metastable Phases and Defect Microstructures in Melt-Spun Ribbons of Nb3Al

  • M. Aindow (a1), J. Shyue (a2), T.A. Gaspar (a3) and H.L. Fraser (a2)

Abstract

The phases and defects produced in a binary alloy, with nominal composition Nb-18at.% Al, have been studied using transmission electron microscopy (TEM). In addition to the equilibrium A15 phase (Nb3Al) a previously unreported Nb-rich B2 phase is present. A significant number of grow-in dislocations were observed in the A15 phase, these have b= a<100> and are predominantly screw on character. They are dissociated into two partial dislocations which bound a stacking fault according to the reaction;

<100> → > 1/2 <100> + SF + 1/2 <100>

The habit plane of the fault is shown to be {012}. These observations are compared with previous studies performed on the isostructual compound V3Si. The consequences of the observed dissociation for the plastic deformation of Nb3Al are discussed.

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[1] Gaspar, T.A. and Hackman, L.E., Proceeding of the Sixth International Conference on Titanium. Cannes, France, June 1988 (Les Editions de Physique, 1988), p.739.
[2] Gaspar, T.A., Rotatable Crucible for Rapid Solidification Process U.S.patent No.4,907,641 (1990).
[3] Wood, E.A., Compton, V.B., Matthias, B.T. and Corenzwit, E., Acta Cryst. 11, 604 (1958).
[4] Cockayne, D.J.H., Ray, I.L.F. and Whelan, M.J., Phil. Mag. A 20, 1265 (1969).
[5] Aindow, M., Shyue, J., Gaspar, T.A. and Fraser, H.L., in preparation (1990).
[6] Essman, U. and Zerwick, G., Phys. Stat. Sol. (b) 57, 611 (1973).
[7] Essman, U., Haag, H. and Zerwick, G., Comm. on Phys. 2, 127 (1977).
[8] Lamine, A.B., Reynaud, F., Mai, C. and Senateur, J.P., Phil. Mag. A 38, 359 (1978).
[9] Nakahara, S., Mahajan, S., Wemick, J.H. and Chin, G.Y., J. Appl.Phys. 50, 3552 (1979).
[10] Reynaud, F. and Lamine, A.B., Acta Metall. 29, 1485 (1981).
[11] von Mises, R. and Angew., Z. Math. Mech. 8, 161 (1928).

Metastable Phases and Defect Microstructures in Melt-Spun Ribbons of Nb3Al

  • M. Aindow (a1), J. Shyue (a2), T.A. Gaspar (a3) and H.L. Fraser (a2)

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