Degradation mechanism of Ni-based superalloy under extreme irradiation environments

Sun, Cheng¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: NICKEL BASE ALLOYS;    ATOMIC DISPLACEMENTS;    IRRADIATION;    HEAVY IONS;    PRECIPITATION;    MEV RANGE;    HARDNESS;    REACTOR MATERIALS;    THERMAL SPIKES;    CRYSTAL DEFECTS;    DISSOLUTION;    RADIATION DOSES;    PHYSICAL RADIATION EFFECTS;   

DOI  :  10.2172/1228073
RP-ID  :  LA-UR--15-29355
PID  :  OSTI ID: 1228073
Others  :  TRN: US1600100

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

This report is a description of various materials (in particular, Rene N4) and their resilience under chemical, physical, and radioactive changes caused by heavy ion irradiation in the MeV range. The following conclusions were reached: the ??' precipitates become fully disordered at a dose of 0.3 dpa: the ??' precipitates partially dissolve after irradiation up to 75 dpa, and the chemical intermixing mainly originates from thermal spike effects; and combining effects of defect clusters, disordering and dissolution determine the evolution of hardness. This work is relevant to materials challenges for Gen IV reactors.