Precipitation Behavior of the Topologically Close-Packed Phase in the DD5 Superalloy during Long-Term Aging

Figure 3

(a) SEM observation of the needle-like TCP phase in the bicrystal DD5 superalloy annealed at 950°C for 1000 h. (b) SEM micrograph of three TCP morphologies (needle-like, short rod-like, and globular). (c) SEM micrograph of the globular TCP phase and MC carbide at the grain boundary.

(a)

(b)

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