|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Modeling and Simulation of Phase and Microstructure Formation in Ni and Ti Alloys during AM Using Finite Elements, Computational Thermodynamics and Phase Field Simulation
||Christian Leinenbach, Toni Ivas
|On-Site Speaker (Planned)
Consolidation during beam based AM process implies very high heating and cooling rates with values up to 10E5 K/s, leading to complex non-equilibrium microstructures. The optimization of the AM processes and alloys requires a deep understanding of the phase and microstructure formation under these consolidation conditions, which is difficult to achieve by experiments only.
In this work, we calculated the transient temperature fields in Ni and Ti alloy parts produced by selective laser melting using finite element methods to obtain information on cooling rates and thermal gradients. Phase selection hierarchy maps based on T0 temperatures were constructed using computational thermodynamics to understand the phase formation under rapid solidification conditions. Microstructure formation upon rapid solidification was simulated using a finite interphase dissipation phase field model developed by Steinbach et al.. The simulation results are compared with results from microstructure analyses of powder bed AM Ni and Ti alloy parts.
||Planned: Supplemental Proceedings volume