|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||CALPHAD Coupled Phase Field Modeling of Sigma Phase Precipitation in Commercial 2507 Super Duplex Stainless Steel Alloy
||Amer Malik, Jan Y. Jonson, Joakim Odqvist, Staffan Hertzman
|On-Site Speaker (Planned)
High performance stainless steels such as duplex (DSS) and super duplex stainless steels (SDSS) are well known for their excellent combination of strength and corrosion resistance. However, a decisive factor in determining the quality of SDSS products is the possibility to form detrimental sigma phase, which causes deterioration of certain physical properties including toughness and corrosion resistance. For instance, in a commercial DSS, only 1 vol.% of sigma phase causes significant decrease in impact toughness and localized corrosion resistance. The aim of this project is to model and simulate the precipitation of sigma phase in a commercial SDSS alloy in order to analyze the factors governing the formation and growth of the detrimental phase. A multicomponent, multiphase field model is used for this purpose. The phase field model is fully coupled to the CALPHAD databases, which makes it possible to derive realistic kinetic and thermodynamic parameters in real time.
||Planned: Supplemental Proceedings volume