|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||F-61: Physical Simulation of Skin Formation during Investment Casting of Nozzle Guide Vanes Made of Ni-based Superalloys
||Mehdi Rahimian, Srdjan Milenkovic, Laura Maestro, Aitor Eguidazu Ruiz De Azua , Ilchat Sabirov
|On-Site Speaker (Planned)
Development of investment casting process has been a challenge for manufacturers of complex shape parts. Numerous experimental casting trials are typically carried out to determine the optimum casting parameters. Particularly, misruns often occur in the as-cast complex shape parts due to the formation of solid skin by freezing of melt in contact with colder ceramic mould. This work presents a new tool for physical simulation of skin formation during investment casting of Nozzle Guide Vanes (NGVs) made of Mar-M247 Ni-based superalloy. Special ceramic tubes are designed and fabricated from the material used for the manufacturing of ceramic moulds for investment casting. Melting/solidification experiments are carried out via GLEEBLE 3800, where the melt is contained in the ceramic tube, which is heated to the temperature of ceramic mould in investment casting estimated by thermal model. NGVs casting trials are produced, and the outcomes of physical simulation tool are validated against them.