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

Mohammad Reza Ahmadi, markus Rath, Erwin Povoden-Karadeniz, sophie Primig, Tomasch Wojcik, Anette Danninger, Martin Stockinger, Ernst kozeschnik

Research output: Contribution to journalArticle

Abstract

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 number 055005
Pages (from-to)1-16
Number of pages16
JournalModelling and simulation in materials science and engineering
Publication statusPublished - Jul 2017

Keywords

  • precipitation strengthening, shearing mechanism, oblate precipitate

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    Ahmadi, M. R., Rath, M., Povoden-Karadeniz, E., Primig, S., Wojcik, T., Danninger, A., ... kozeschnik, E. (2017). Modeling of precipitation strengthening in Inconel 718 including non-spherical γ'' precipitates. Modelling and simulation in materials science and engineering, 1-16. [ 055005 ].