Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys

doi:10.1016/S1006-7191(08)60110-6

Abstract

Abstract:

The volume fraction and morphology of the TCP-phase formed in two kinds of Ni-Mo-Cr-Re superalloys under different heat treatment conditions were investigated in this paper. In Re-5% alloy, with increasing of the heat treatment temperature and prolonging the holding time, the volume fraction of TCP-phase decreased and the TCP-phase size increased. At relatively lower temperature, the TCP-phase prefers to present in the dendrite cores. In Re-10% alloy, the volume fraction and size have the same change tendency as that of in Re-5% alloy, but the morphology will change from needle-like and block-like to sphere when the temperature increases. The TCP-phases formed in these two Ni-Mo-Cr-Re alloys are σ and P phase.

Key words: Heat treatment, TCP-phase, Superalloy

Pingli MAO,Yan XIN,Ke HAN,Weiguo JIANG. Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(5): 365-372.

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Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys

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