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 |
Development of a Gamma-prime-strengthened Ni-base Superalloy for Laser Powder Bed Fusion |
Author(s) |
Tomonori Kitashima, Tomoki Hiraga, Dennis Edgard Jodi, Kyoko Kawagishi, Masahiko Demura, Shinya Hibino, Takayoshi Nakano, Makoto Watanabe |
On-Site Speaker (Planned) |
Tomonori Kitashima |
Abstract Scope |
Gamma-prime-strengthened Ni-base superalloys are attractive to apply for additive manufacturing. However, the fabricable conditions of superalloys with a volume fraction of ~30% gamma-prime phase, such as IN738LC, are limited because of solidification cracking that occurs during fabrication. We developed a new Ni-base superalloy that suppressed solidification cracking. That new alloy showed a smaller brittle temperature range (BTR), a volume fraction of ~30% gamma-prime phase, a slower gamma-prime precipitation, and a lower density than IN738LC. Furthermore, high-temperature strength was slightly lower than IN738LC. The systematic data was accumulated to design the new alloy. We performed Scheil solidification simulations using Thermo-Calc software to obtain the BTR and equilibrium gamma-prime volume fraction for more than 30 compositions. JMatPro software was used to estimate density, high-temperature strength, and precipitation rate. Powder was produced by gas atomization. SLM 280HL was used to fabricate specimens, and the properties listed above were evaluated. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, |