|About this Abstract
||Materials Science & Technology 2019
||Late News Poster Session
||P1-128 Finite Element Analysis of Heat Transfer through the Laser Scan on Alumina (Al2O3) during Additive Manufacturing Process
||Mohammad Ali Ausaf Qureshi, William David Griffiths, Artemis Stamboulis
|On-Site Speaker (Planned)
||Mohammad Ali Ausaf Qureshi
In this work, the effect of localized heat transfer during Selective Laser Sintering (SLS) of alumina was studied. SLS occurs below the melting point, but the developed parts tend to have high porosity, thus the effect of porosity was taken into account. The temperature dependent material properties were considered for specific heat capacity, thermal conductivity and thermal expansion. The material was subjected to two different types of lasers, CO2 and Nd:YAG. The laser was mathematically modeled by Gaussian Distribution and Beer-Lambert’s Law. Furthermore, the laser power and scan speeds were varied to study their effect on the temperature distribution within the material. The problem was solved using Fortran and commercial FEM code Abaqus. The ‘mesh dependency’ was taken into consideration to achieve an accurate solution. An experimental benchmark was also established to validate the simulation results.