Data for: Nuclear Response of Additive Manufactured GRCop-84 Copper for use in Lower Hybrid Launchers in a Fusion Environment

Nuclear Response of Additive Manufactured GRCop-84 Copper for use in Lower Hybrid Launchers in a Fusion Environment A. H. Seltzman*, S. J. Wukitch Massachusetts Institute of Technology, Plasma Science and Fusion Center, 190 Albany St, Cambridge, MA, 02139 (Received dd month 2020; published dd month 2020) Recent advances in selective laser melting (SLM) 3D printing technology allow additive manufacture of lower hybrid current drive (LHCD) 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. Tensile strength and thermal conductivity are compared to other competing high conductivity copper alloys for fusion use. Swelling and conductivity at 100 DPA is predicted in the 1-2% and 65-70% IACS range, respectively by comparison to copper alloys with similar precipitate and grain size. Self-similar ion irradiation of a GRCop-84 target at 430°C to 20 DPA resulted in no noticeable void formation.聚变环境下用于低杂波发射装置的增材制造GRCop-84铜合金的核响应特性 A. H. Seltzman*, S. J. Wukitch 麻省理工学院等离子体科学与聚变中心，美国马萨诸塞州剑桥市奥尔巴尼街190号，邮编02139（2020年*月*日收稿；2020年*月*日发表） 选择性激光熔化（SLM）3D打印技术的最新进展，使得可采用新型材料格伦研究铜84（GRCop-84）——一种含8at.%铬、4at.%铌的Cr₂Nb型析出强化合金——通过增材制造工艺制备低杂波电流驱动（LHCD）射频发射装置，其结构构型为传统机加工手段无法实现。本研究将该合金的抗拉强度与热导率，与其他适用于聚变领域的高导电性竞争性铜合金进行了对比。通过与析出相和晶粒尺寸相近的铜合金对比，预测该合金在100原子位移剂量（DPA）下的肿胀率为1%~2%，热导率保留率为国际退火铜标准（IACS）的65%~70%。在430℃条件下对GRCop-84靶材开展20 DPA的自相似离子辐照实验后，未观察到明显的空洞形成。