About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development VI – Closed-Loop Alloy Design
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Presentation Title |
A Study of the Thermal Cycling Effect on Fabricated Zr-Based Bulk Metallic Glass by Standard and Non-standard Beam Distribution Upon Laser Powder Bed Fusion |
Author(s) |
Sepide Hadibeik Neishaboori, Hossein Ghasemi-Tabasi, Andreas Burn, Florian Spieckermann, Jurgen H. Eckert |
On-Site Speaker (Planned) |
Florian Spieckermann |
Abstract Scope |
Additive manufacturing of metallic glass parts is restricted by the thermal cycling and subsequent structural relaxation of solidified layers, resulting in free volume annihilation negatively impacting the ductility of built parts. Modification of the laser beam shape provides a means of controlling the shape and temperature distribution of the melt pool. This results in improved productivity in the additive manufacturing process. In the present work, an advanced beam shaping technique was utilized to form a shallow and wide melt pool during laser powder bed fusion, featuring a homogeneous beam distribution as opposed to the standard Gaussian distribution. Differential scanning calorimetry reveals that the relaxation and crystallization enthalpy of samples produced with this non-standard beam shape is increased. The associated increase in free volume and structural rearrangements on the short- and medium-range order level within the structure of these samples is in good agreement with substantially improved strength and ductility during plastic deformation upon uniaxial compression testing. |
Proceedings Inclusion? |
Planned: |