| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Effect of Post-processing on Porosity, Secondary Phases, and Mechanical Behavior of Binder Jet Fabricated Stainless Steels |
| Author(s) |
Nancy Huang, Olivia J. Cook, Christopher M. Kube, Andrea P. Argüelles, Allison M. Beese |
| On-Site Speaker (Planned) |
Nancy Huang |
| Abstract Scope |
The impacts of processing conditions on the microstructure and mechanical properties of stainless steel 316L (SS316L) and SS316 infiltrated with bronze (SS316+bronze) fabricated via binder jet additive manufacturing were investigated. The environment used during bronze infiltration, with different amounts of H2, N2, and Ar, significantly impacted secondary phase formation and the pore size and volume fraction due to different wettability associated with the different environments. Porosity was measured using optical imaging and X-ray computed tomography. Ultrasonic nondestructive evaluation (NDE) was used to measure attenuation and wave speed, and these signals were related to the microstructure and mechanical properties obtained through uniaxial and notched tension testing. For all samples, strength and ductility were found to be inversely correlated to pore volume fraction and attenuation, and positively correlated to wave speed. NDE was shown to be able to detect the locations of failure. |