Alloy name: ALLVAC 718PLUS
Diagram No.: 1101
Type of diagram: TTT
Chemical composition in weight %: 0.025% C, 18.0% Cr, 2.70% Mo, 1.0% W, 9.0% Co, 10.0% Fe, 5.40% Nb, 0.70% Ti, 1.45% Al, 0.007% P, 0.004% B
Alloy group: Nickel-based alloys
Note: TTT Curves of Delta Phase Precipitation of Annealed Alloy 718Plus. Determined by Modeling (Solid Line) and Experiment (Dashed Line).
The TTT curve of Delta phase precipitation obtained by modeling and by experiment on super-solvus (1038C) treated alloy [10] is shown in Figure. It seems that Delata phase precipitation at grain boundaries is faster than the modeling prediction, but precipitation at other locations is sluggish. Since Delta phase precipitation temperature coincides with typical solution temperature in this alloy, it would be very interesting to study the Delta phase formation of hot worked material during solution treatment.
Reference: Not shown in this demo version.

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