期刊
FUSION ENGINEERING AND DESIGN
卷 173, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.fusengdes.2021.112847
关键词
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When using Laser Powder Bed Fusion (L-PBF) to manufacture GRCop-84, the minimum thickness of vertical walls and septa is 1 mm, with thinner walls warping during printing. Additionally, roughness increases on both upper and lower surfaces as the angle increases.
Laser Powder Bed Fusion (L-PBF), also known as Selective Laser Melting (TM) (SLM (TM)), allows additive manufacture of lower hybrid current drive (LHCD) Radio Frequency (RF) launchers from a new material, Glenn Research Copper 84 (GRCop-84), a Cr2Nb (8 at. % Cr, 4 at. % Nb) precipitation hardened alloy, in configurations unachievable with conventional machining. The resolution and geometric limitations are tested to explore the limitations of L-PBF printing of GRCop-84. Printing holes in the vertical and horizontal direction are examined to determine the minimum cooling channel diameter. Internal stress limits the minimum thickness of vertical walls and septa to 1 mm, thinner walls warp during printing. Roughness is minimized on vertical surfaces and increases on both upper and lower surfaces as angle increases. Accuracy within 40 mu m is typical on well supported structures.
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