A model for precipitation strengthening in multi-particle systems

Mohammad Reza Ahmadi*, Erwin Povoden-Karadeniz, K. I. Öksüz, Ahmad Falahati, Ernst Kozeschnik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In this work, we present a consistent model describing the increase of yield strength caused by precipitation of second phase particles. Shearing and non-shearing mechanisms are accounted for, depending on the coherency between precipitates and matrix.

The physical key parameters entering the model are critically evaluated on basis of the dislocation line tension, free distance between two particles and precipitate radius. A set of equations is derived, which describes the yield strength increase due to the interaction between dislocations and precipitates. Based on coupling equations for the individual strengthening mechanisms, the model allows for a predictive simulation of the final yield strength caused by precipitation in multi-particle, multi-phase systems. With the aid of contemporary computational power, the enhanced strengthening equations deliver more accurate results compared to the conventional equations.
Original languageEnglish
Pages (from-to)173-186
JournalComputational Materials Science
Publication statusPublished - 2014
Externally publishedYes

Fields of Expertise

  • Advanced Materials Science

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