| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
An Experimental Characterization of Thermophysical Properties of a Porous Ceramic Shell Used in the Investment Casting Process |
| Author(s) |
Christopher Jones, Mark Jolly, Anders Jarfors, Mark Irwin |
| On-Site Speaker (Planned) |
Christopher Jones |
| Abstract Scope |
Predicting defects that develop during casting processes using computer simulations is becoming increasingly commonplace in the foundry industry. This provides a cost-effective alternative to pouring a potentially large number of trial castings. However, such simulations are only viable as predictive tools if they are supplied with appropriately accurate material property data. This study presents the results of an investigation which characterizes the thermophysical properties of an investment casting mould with a zirconium dioxide/cobalt aluminate prime coat in combination with fused silica/fibre reinforced backup coats. The specific heat capacity (Cp) and thermal diffusivity (α) were determined using differential scanning calorimetry (DSC) and laser flash analysis (LFA) experimental techniques respectively from which the thermal conductivity (λ) is derived. A commercially available computational fluid dynamics (CFD) simulation package was used in combination with these thermophysical properties to predict the temperature distribution within the mould before making direct comparisons to an experimental casting as validation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |