718 Alloy

Alloy name: 718
Diagram No.: 1081
Type of diagram: TTT
Chemical composition in weight %: 53.46% Ni, 18.65% Cr, 3.06% Mo, 5.08% Nb, 0.99% Ti, 0.72% Al, 0.035% C
Alloy group: Nickel-based alloys
Note: TTT Diagram of Alloy 718.
The TTT diagram of alloy 718 is given in Figure [8]. The precipitation reaction of interest in this work were: the equilibrium phase, Delat-Ni3Nb and the coherent precipitates, Gamma” and Gamma’. As seen in Figure, the ratio of precipitate hardening elements, Ti + Al/Nb, may affect the amount and solvus of coherent precipitates. New DTA approach suggested in this work offers an effective and efficient method to characterize this alloying effect.
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