About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Process-induced Microstructures and Defects
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Presentation Title |
Effect of Deposition Sequence on the Interfacial Characteristics of Additively Manufactured Stainless Steel 316L/Inconel 718 Multi-material Structures |
Author(s) |
Sourav Goswami, V.M.S.K. Minnikanti, Sushil Mishra, Shyamprasad Karagadde |
On-Site Speaker (Planned) |
Sourav Goswami |
Abstract Scope |
Emerging engineering applications often require components with spatially varying physical and mechanical properties. Multi-material additive manufacturing is an enabling technology that facilitates the fabrication of not only complex shapes, but also complex materials by utilizing composition as a spatial design parameter. The present work investigates the effect of deposition sequence on the interfacial characteristics of additively manufactured stainless steel 316L/Inconel 718 (SS316L/IN718) multi-material structures. Deposition of IN718 on top of SS316L produces relatively flat, sharp interfaces with well-defined compositions, and IN718 grains growing epitaxially on SS316L grains. However, reversing the deposition sequence leads to diffuse interfaces with significant dilution in composition, melt pool banding, and a lack of epitaxial growth. It was found that solute rejection and convective effects, rather than previously attributed process dependencies, were responsible for the unique interfacial morphology. Multi-material parts of stainless steel and Inconel find use in power generation, aerospace structures, and sub-sea manifolds. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Modeling and Simulation |