About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
In-situ Monitoring and Numerical Simulation of Shrinkage during Sintering in Metal Binder Jetted Parts |
Author(s) |
Mohammad Jamalkhani, Zhifang Deng, Iman Dashtgerd, Amir Mostafaei |
On-Site Speaker (Planned) |
Amir Mostafaei |
Abstract Scope |
In binder-jetted materials, shrinkage and deformation occur during the post-processing sintering step, both of which are affected by the powder packing density and green density of the binder-jetted materials. The powder characteristics, including morphology, size, and distribution, as well as the binder jet printing process itself, influence the initial green density. In this research, we compare the densification behavior of ultra-fine 316L SS virgin powder with a 1-year-old used powder using a lab-scale in-situ monitoring system and numerical simulation. The comprehensive analysis of powder flowability and packing density, densification behavior, and shrinkage reveals that the consolidated parts using virgin powder (with a green density of 57%) can achieve a relative density above 99% with an anisotropic shrinkage in the Z>X>Y direction. In contrast, the used powder exhibits a lower green density of ~52%, a higher shrinkage rate in all three dimensions, and a decreased degree of anisotropy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, Powder Materials |