About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
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Presentation Title |
Characterization of Phase and Mechanical Developments of Martensitic α' Phase in Ti-6Al-4V Under Laser Processing via In-Situ Synchrotron X-ray Diffraction |
Author(s) |
Seunghee Oh, Joseph Aroh, Andrew Chuang, Nicholas Lamprinakos, Robert Suter, Anthony Rollett |
On-Site Speaker (Planned) |
Seunghee Oh |
Abstract Scope |
Ti-6Al-4V (Ti64), one of the extensively studied alloys for additive manufacturing, is an α+β titanium alloy involving solid-state phase transformations. Under fast cooling conditions, i.e., laser processing, the high-temperature phase, β, is known to undergo a martensitic transformation. The reaction determines the microstructural and mechanical behaviors, which influence the material properties of the printed parts. In this study, an in-situ synchrotron X-ray diffraction with high temporal and spatial resolution is utilized to observe the rapid phase and mechanical development under laser processing. With the fully martensitic Ti64 prepared from as-printed parts, multiple in situ measurements are conducted to study how the phase configuration developed at different locations in the melt pool. The changes in the azimuthal distribution of lattice parameters imply anisotropic behavior of the deformation during laser processing. The spatial mapping analysis around the melt pool illustrates how phase evolution affects the macro-strain evolution. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Additive Manufacturing, Phase Transformations |