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 |
In-situ and Ex-situ Characterization of Inconel 738 Subjected to Additive Manufacturing |
Author(s) |
Adriana Eres-Castellanos, Jeremy Shin, Ruben Ochoa, Chandler Becker, Beau Nannie, Jonah Klemm-Toole, Alec Saville, Brian Rodgers, Kamel Fezzaa, Amy Clarke |
On-Site Speaker (Planned) |
Adriana Eres-Castellanos |
Abstract Scope |
Ni-based superalloys are commonly used in aerospace applications because of their high-temperature performance, including excellent corrosion and creep resistance. Although Ni-based superalloys have traditionally been processed by casting, the use of additive manufacturing (AM) enables complex designs and/or near-net shapes to be produced. In Laser Powder Bed Fusion (LPBF), layers of powder are sequentially deposited on top of previously melted layers fused together by a laser beam. To understand microstructure development with processing, it is essential to understand the laser-material interactions during melting and solidification. In-situ synchrotron x-ray imaging of spot melting during simulated LPBF of Inconel 738 with different laser powers was performed at the Advanced Photon Source at Argonne National Laboratory. Solid-liquid interface velocities were directly measured and thermal gradients were modeled. Ex-situ characterization of the solidification microstructures was also performed to understand solidification of these alloys with processing variations. |