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 |
Operando Characterization of Laser Powder Bed Fusion of Ti-6Al-4V and Ti-6Al-4V-3Fe via Synchrotron High-speed XRD |
Author(s) |
Ming Chen, Marco Simonelli, Zhiyi Zou, Steven Van Petegem, Yau Yau Tse, Dario Ferreira Sanchez, Helena Moens-Van Swygenhoven |
On-Site Speaker (Planned) |
Ming Chen |
Abstract Scope |
High temperatures and rapid heating/cooling rates during laser powder bed fusion make it difficult to quantify thermal cycles and phase evolution the material undergoes during printing. Such information is however crucial for understanding the evolving microstructures, especially when the material undergoes phase transformations during thermal cycling. Here, we perform high-speed (20 kHz) X-ray diffraction experiments on thin walls and bulks of Ti-6Al-4V-3Fe and Ti-6Al-4V at synchrotron beamlines. We measure temperature profiles and cooling rates derived from X-ray diffraction patterns acquired in transmission mode for multiple layers below the surface of thin walls while the laser rescans the surface. The shape and geometriesof melting pool and heat-affected zone are estimated. We also investigate the effect of in situ alloying on phase evolution during laser fusion of a blended powder consisting of Ti6Al4V with Fe particles in reflection mode to interpret microstructures formation under different laser processing parameters. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Phase Transformations, Titanium |