About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Stainless Steel and Aluminum Alloy Development for Highly Consistent and Isotropic Properties in Laser Powder Bed Fusion |
Author(s) |
Benjamin S. Rafferty, Jeremy Iten, Aaron Stebner , Akansh Singh, Branden Kappes, Sridhar Seetharaman, Dyuti Sarker, Soumya Mohan |
On-Site Speaker (Planned) |
Benjamin S. Rafferty |
Abstract Scope |
To increase additive manufacturing (AM) robustness and reliability, there is a need for metal feedstocks that produce more isotropic and highly consistent properties. Current laser powder bed fusion (LPBF) feedstocks show variation in microstructure and mechanical properties based on build direction. By combining integrated computational materials engineering (ICME) with an inoculant-based approach, we experimentally validated a more isotropic 300 series stainless steel and an extraordinarily consistent high-strength 5000 series aluminum metal matrix composite. The 300 series stainless steel showed UTS measurements consistency across X-Y and Z direction of 96% compared to 90% for 316L. The 5000 series aluminum MMC showed >99% equivalent UTS across X-Y and Z directions and showed no change in YS or UTS from the as-built condition after a 2-hour stress relief at 300 C. The 5000 series aluminum MMC demonstrated a yield strength 3 times that of wrought 5083-O with 7% elongation. |