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Shaumik Lenka
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Proceedings Papers
AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 1087-1102, October 15–18, 2024,
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To operate future fusion power plants economically, the fusion community needs structural materials that can last longer and operate at higher temperatures than current materials, as well as better heat-dissipating components and a reliable supply chain for them. Additive manufacturing (AM) of existing reduced activation ferritic/martensitic steels (RAFMS) has the potential to solve these problems, which is why we developed a laser powder bed fusion (LPBF) process for Eurofer97 steel, demonstrating excellent mechanical properties (~30% improved yield strength, ~6300% improved creep rupture life, similar toughness and ductility compared to wrought Eurofer97) and low process scatter (relative standard error for yield, tensile strength and elongation on build plate <1%). The main remaining challenge is the consistent sourcing of quality Eurofer97 powder, but we have shown that this can already be done if the limits on impurity elements are slightly relaxed. Our work lays the groundwork for the manufacture of complex fusion components that can dissipate heat better and have a higher operating temperature thanks to the improved material properties. It also helps plug the current RAFMS supply chain gap, enabling easier component prototyping and small-scale manufacture that can smoothly scale in volume in the future.