About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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Presentation Title |
Ultra-High Strength and Ductility in a Lightweight Fe-Mn-Al-C Austenitic Steel Fabricated via Laser Powder Bed Fusion |
Author(s) |
Raiyan Seede, Jiahui Ye, Austin Whitt, Sean Gibbons, Philip Flater, Bernard Gaskey, Alaa Elwany, Raymundo Arroyave, Ibrahim Karaman |
On-Site Speaker (Planned) |
Raiyan Seede |
Abstract Scope |
Low-density Fe-Mn-Al-C steels have generated recent interest in the automotive and defense industries due to their potential for structural weight reduction while maintaining high strength and ductility. Austenitic Fe-Mn-Al-C steels with high Al content (~9 wt.%) exhibit strengths greater than 1.2 GPa with ~35% elongation. Laser powder bed fusion (LPBF) additive manufacturing (AM) can fabricate steel parts with complex geometries and has the potential to control local microstructural and mechanical properties. However, literature on LPBF processing of Fe-Mn-Al-C alloys has typically focused on low Al content (<5 wt.%) twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) compositional regimes. This study presents the effects of LPBF processing on an Fe-30Mn-9Al-1Si-0.5Mo-0.9C austenitic steel. A process optimization framework is utilized to determine an optimal LPBF processing window for fabrication of >99% density parts. As-fabricated specimens displayed significant work-hardening characteristics with excellent strength and ductility of up to 1.3 GPa and 36% elongation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Iron and Steel, Characterization |