Ni-Ti-Al alloys

Details Ni-Ti-Al alloys Ni-Ti-Al alloys

1993-04-30

1994-08-09

Yee, Deborah

Metal treatment

Stock

Age or precipitation hardened or strengthened

C22C 1903

Patent

active

053363400

ABSTRACT:
Ni--Al--Ti alloys which are plastically deformable at room temperature and have good strength at high temperature include a structure of regions of a .beta. phase of ideal composition NiAl, a .beta.' phase of ideal composition Ni.sub.2 TiAl and a .gamma.' phase of ideal composition Ni.sub.3 Al, the regions being epitaxially related to one another and preferably the .beta. phase or the .gamma.' phase is continuous.

REFERENCES:
Thompson et al., "Structure and properties of the Ni.sub.3 Al (.gamma.') Eutectic Alloys Produced by Unidirectional Solidification", American Society for Metals Transactions, Quarterly, vol. 62, No. 1, 1969, Metals Park, Ohio, US, pp. 140-154.
The Nickel-Rich Corner of the Ni-Al-Ti System, pp. 168-174, P. Willemin, M. Durano-Charre.
The High Intrinsic Creep Strength of Non-Stoichiometric Ni.sub.2 AlTi, pp. 594-595, R. S. Polvani, P. R. Strutt, and Wen-Shian Tzeng.
Scripta Metallurgica, vol. 17, pp. 209-214.
A Microstructural Study of Ni.sub.2 AlTi-Ni(Al,Ti)-Ni.sub.3 (Al,Ti) three-phase Alloy, J. Mater. Res., vol. 6, No. 2, Feb. 1991, pp. 343-354.
Phase Equilibria in the Ni-Al-Ti System at 1173K, P. Nash and W. W. Liang, vol. 16A, Mar. 1985, pp. 319-322.

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