|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||Influence of Platinum Chaplet Pins on Recrystallization Defect
in Single Crystal Turbine Blade Casting
||Runnan Wang, Qingyan Xu, Baicheng Liu
|On-Site Speaker (Planned)
As the turbine blade structure becomes more and more complex, platinum chaplet pins are usually used to meet the manufacturing requirements of single crystal hollow blade casting. In this study, both experiments and simulation were carried out to study the influence of gib-bosity induced by platinum chaplet pin on recrystallization defect in single crystal blade casting. The experimental results show that recrystallization took place in 48% of the gib-bosities and can penetrate hundreds of micron into the blade. The tendency of recrystallization formation significantly increases with the increase of gib-bosity's location height.
Then, the nucleation of recrystallization grains was determined to be driven by the plastic deformation caused by solidification contraction. Coupled with FEM method, a thermal elastoplastic model considering the anisotropic mechanical properties of single crystal super-alloy was utilized to predict the deformation behaviour during directional solidification process of turbine blade casting.
||Planned: Supplemental Proceedings volume