About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
NEW TIME (was 3:40 pm) Investigating the Effects of Infiltration Conditions on the Microstructure and Mechanical Properties of Binder Jet Fabricated Stainless Steel/Bronze through Ultrasonic Testing |
Author(s) |
Nancy Huang, Olivia J. Cook, Robert L.W. Smithson, Christopher M. Kube, Andrea P. Argüelles, Allison M. Beese |
On-Site Speaker (Planned) |
Nancy Huang |
Abstract Scope |
In this study on binder jet fabricated 316 stainless steel infiltrated with bronze, infiltration environment, bronze infiltrant amount, and infiltration configuration were varied to study the effects of infiltration conditions on resultant microstructure and mechanical properties. Microstructures were characterized through ultrasonic testing and optical and scanning electron microscope imaging, while mechanical properties were evaluated with uniaxial tension and hardness testing. Samples infiltrated in N2-based environments had Cr2N precipitates throughout the microstructure, which resulted in increased hardness and tensile strength compared to samples infiltrated in an Ar-based environment. Ultrasonic attenuation and wave speed measurements were linked to porosity and mechanical properties, and most samples failed near regions with high local attenuation and low local wave speed values, which indicated regions of higher porosity. This study demonstrates the potential for ultrasonic testing to be used as a nondestructive evaluation technique to assess porosity and mechanical properties of binder jet additively manufactured metals. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |