Modeling of precipitation strengthening in Inconel 718 including non-spherical γ" precipitates

Mohammed Reza Ahmadi, Markus Rath, Erwin Povoden-Karadeniz, Sophie Primig, Tomasz Wojcik, Anette Danninger, Martin Stockinger, Ernst Kozeschnik

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14 Citations (Scopus)


In this study, the classical strengthening equations for weak and strong particles are advanced to account for oblate-shaped γ'' precipitates in Inconel 718. The model is verified on quantitative stereology of size and distribution for both shearable and non-shearable mechanisms. The evolution of precipitation strengthening of aged superalloy Inconel 718 is simulated. In addition to precipitation strengthening, contributions of solid solution strengthening and the grain size effect are considered. Simulation results indicate a sound prediction of the final yield strength based on the presented model.
Original languageEnglish
Article number055005
Number of pages17
JournalModelling and simulation in materials science and engineering
Issue number5
Publication statusPublished - 15 May 2017
Externally publishedYes


  • Oblate precipitate
  • Precipitation strengthening
  • Shearing mechanism

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