| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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| Presentation Title |
Superior Strengthening via Nanoscale Lamellae in Eutectic Multi-Principal Element Alloy Additively Manufactured by Laser Powder Bed Fusion |
| Author(s) |
Thinh Huynh, Kevin Graydon, Tanner Olson, Amberlee S Haselhuhn, Yongho Sohn |
| On-Site Speaker (Planned) |
Thinh Huynh |
| Abstract Scope |
A novel eutectic multi-principal element alloy (EMPEA), Al16.2Co30.3Cr9.7Fe10.4Ni30.7W2.2C0.59 was gas atomized using an in-house laboratory scale gas atomizer to produce powder feedstock for laser powder bed fusion (PBF-LB). Melting was achieved in air at a superheating temperature of 1800 °C and gas atomized using Argon. PBF-LB optimization was performed as a function of laser power and scan speed, resulting in crack free samples with density exceeding 99.95 % by using a combination of 350 W and 1000 mm/s. The as-fabricated alloy displayed a two-phase microstructure, featuring nanoscale, alternating FCC and BCC phases. This unique microstructure exhibited remarkable tensile strength, yield strength, and elongation of ~1.6 GPa, ~1.3 GPa, and ~10 %, respectively. Composition and microstructure were examined via electron microscopy and x-ray diffraction to corroborate the mechanical behavior to the analytical strengthening mechanisms calculations for EMPEA. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, Phase Transformations |