About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Materials Design and Alloy Development VII – Design With Multi-Modal and Field Data by Integrating Uncertainty
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| Presentation Title |
Microstructure and mechanical properties engineering of super duplex stainless steel produced by single-and dual-laser powder bed fusion |
| Author(s) |
Michele Vanini, Pushkar Prakash Dhekne, Samuel Searle, Bey Vrancken, Kim Vanmeensel |
| On-Site Speaker (Planned) |
Michele Vanini |
| Abstract Scope |
This study explores single- and dual-laser powder bed fusion as a means to locally tailor the microstructure of super duplex stainless steel, a material composed of δ-ferrite and γ-austenite phases. The balance between these phases is highly sensitive to the thermal history, especially within the critical 800–1200 °C range where austenite nucleates and grows from primary δ-ferrite. To address this, an analytical model using a moving Goldak heat source was developed to optimize second laser beam parameters, aiming to maximize residence time within this crucial temperature window and promote austenite formation. The approach successfully produced specimens with varied austenite fractions and tensile properties. These findings highlight that precise adjustment of laser parameters enables significant local control over microstructure and mechanical properties in 3D, along both build and scan directions. This work underscores the potential of dual-laser strategies for advanced, spatially resolved properties in additively manufactured components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Mechanical Properties |