About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Directed Energy Deposition of Bi-metallic Tensile Specimens by Direct Bonding of Inconel 625 to Stainless Steel 304 |
Author(s) |
Anthony Stair, Nicholas Jones, Jack Beuth, Maarten de Boer |
On-Site Speaker (Planned) |
Anthony Stair |
Abstract Scope |
Bonding dissimilar metals by Additive Manufacturing (AM) can create structures with complex geometries and tailored material properties. Bonding can be difficult due to the formation of unintended intermetallic phases that may form, or due to stresses on the part caused by large differences in thermal expansion coefficients. In this work, by direct bonding Inconel 625 powder feedstock to a stainless steel 304 plate using directed energy deposition (DED), we have successfully avoided gross defects such as voids, cracks and deleterious phases in single beads and single-layer pads. CALPHAD simulations have guided the choice of process parameters needed to avoid the formation of intermetallics. Bi-metallic tensile specimens have been printed out-of-plane with an Inconel 625 to stainless steel 304 joint located within the gage section. Strength results will be presented to evaluate the bond quality of the tailored bimaterial joint. |