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The Stability of B2 Compounds in Ti-Modified Nb-Al Alloys

  • J. Shyue (a1), D-H. Hou (a1), S.C. Johnson (a1), M. Aindow (a2) and H.L. Fraser (a1)...

Abstract

It has been found that additions of Ti to Nb3Al results in the formation of phases with the B2 crystal structure in as-cast samples. The microstructure and phase stability of two alloys, namely Nb-15Al-10Ti and Nb-15Al-40Ti (in at.%), have been studied. Heat-treatment of the Nb-15Al-10Ti alloy at 1100°C results in the precipitation of an A15 phase in the B2 matrix. A particular orientation relationship exists between the two phases. Heat-treatment above 1600°C results in the dissolution of the second phase. The ALCHEMI technique has been employed to assess qualitatively the distribution of atom types over the two sublattices of the B2 compound.

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The Stability of B2 Compounds in Ti-Modified Nb-Al Alloys

  • J. Shyue (a1), D-H. Hou (a1), S.C. Johnson (a1), M. Aindow (a2) and H.L. Fraser (a1)...

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