| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
|
| Presentation Title |
Distortion Modeling during Sintering of Binder Jet Printed Parts |
| Author(s) |
Basil J. Paudel, Albert C. To |
| On-Site Speaker (Planned) |
Basil J. Paudel |
| Abstract Scope |
During sintering of binder jet (BJ) printed parts, non-linear and often anisotropic distortion is seen with shrinkage values in the range of ~5-20%. The geometry and complexity of the part combined with the sintering stress and high temperature creep makes prediction of the final part geometry after sintering more difficult, thus hindering its wide adoption in the industry. In the present study, a viscoplastic constitutive model is adopted to predict the distortion during sintering of the stainless steel 316L BJP parts. The effects of friction and gravity are considered. The model is implemented through the usermat subroutine in Ansys and is used to simulate the distortion of a sintered part. The shrinkage results from the numerical analysis using the identified parameters are validated against experimental measurements. It is shown that the calibrated model predicts the shrinkage and shape distortion reasonably well during the sintering process. |