Hardness and phase analysis of IN 718 deformed at high strain rate

Renhof, L.; Guder, S.; Werner, E.
June 2004
Analytical & Bioanalytical Chemistry;Jun2004, Vol. 379 Issue 4, p619
Academic Journal
Specimens of the nickel base alloy IN 718 deformed at high strain rate (~10 s-1), as realized in a screw press, have higher strength than parts forged conventionally in a hydraulic press. Microstructure analyses in light and transmission electron microscopes reveal the precipitation of very small Ni3Nb particles (γ″-phase) to be the reason for the increased hardness. Several processing routes are discussed and analyzed in relation to the TTT-diagram of IN 718.


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