About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
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Presentation Title |
In-situ Characterisation of Directed Energy Deposition of Selected Nickel Superalloys |
Author(s) |
Harry Edward Chapman, Imogen Cowley, David Rees, Kai Zhang, Sebastian Marussi, Ben Saunders, Martyn A. Jones, Chu Lun Alex Leung, Peter D. Lee |
On-Site Speaker (Planned) |
Harry Edward Chapman |
Abstract Scope |
Directed Energy deposition (DED) enables rapid design of complex 3D shapes and their production in high performance nickel superalloys, with many promising applications in the aerospace sector for component manufacture or repair. However, components made with the DED process may be susceptible to a number of detrimental features, including porosity and cracking. This study investigates the effect of processing parameters on porosity and melt pool dimensions during DED of IN718Plus using in situ synchrotron radiography. We dynamically quantify melt pool dimensions, the porosity in the melt pool, and porosity formation mechanisms in situ. By coupling these in situ results to ex situ characterisation of features in the final build we develop both novel qualitative insights and quantitative process-structure-property relationships, allowing for the optimisation of the DED process for reduction in surface roughness, reduction in porosity, and refined grain structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Powder Materials, Mechanical Properties |