About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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Presentation Title |
Creep Behavior of 316L Stainless Steel Fabricated by Electron Beam Powder-bed Fusion |
Author(s) |
Kwang-Hyeok Lim, Jong-Soo Bae, Shubham Chandra, Xipeng Tan, Gi-Dong Sim |
On-Site Speaker (Planned) |
Kwang-Hyeok Lim |
Abstract Scope |
Additive manufacturing is a computer-aided technology that fabricate near net-shape structures. Previous studies are focusing on the L-PBF 316L stainless steel (SS) due to its superior strength without loss of ductility. However, the creep resistance of the L-PBF 316L SS are significantly lower than conventional 316L SS.
Here, we report the creep behavior of EB-PBF 316L SS at 600 ℃ and 650 ℃. Creep life of EB-PBF 316L SS was 8 times longer than L-PBF 316L SS and 3 times longer than conventional 316L SS. Laves phase and segregated Mo and Si were observed along the grain boundaries. In addition, Laves phase precipitation was dominant near the silicon oxide. Formation of Laves phase during short term creep was investigated by thermodynamic calculations. Exceptional creep properties are attributed to the early formation of fine Laves phase along the grain boundaries which retards the grain boundary migration and fills creep cracks. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |