About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
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Presentation Title |
Effect of Interlayer Delays on the Microstructure and Properties of As-built Ti64 Parts in Direct Energy Deposition Process |
Author(s) |
Rajib Halder, Rigved P Sardey, Amit Kumar Verma, Zhening Yang, Anthony D Rollett |
On-Site Speaker (Planned) |
Rajib Halder |
Abstract Scope |
Layer-by-layer deposition during the Direct Energy Deposition (DED) process leads to heat accumulation, which in turn, influences the cooling rate of the printed parts. To curb this heat accumulation, we implemented a delay between the layers, commonly known as interlayer delay. In this study, we investigated how interlayer delay governs microstructure, and thereby mechanical properties. In summary, dramatic coarsening of microstructure was observed with substantial heat buildup. Moreover, the microstructural features and variation in lath thickness size as a function of build height were investigated with respect to interlayer delays. Hardness mapping was carried out on specimens fabricated with different interlayer delays to illustrate the role of heat buildup on the mechanical properties of as-built Ti-6Al-4V parts.
Keywords: Ti-6Al-4V, Direct Energy Deposition, Interlayer Delays, Microstructure, Hardness |