Dislocation density evaluation of three commercial SA508Gr.3 steels for reactor pressure vessel

摘要：

　　Reactor pressure vessel(RPV)plays a crucial role in the safe operation of nuclear power plants(NPPs).However,RPV steels are generally subjected to high-energy neutron irradiation during the entire in-service lifetime,which causes the hardening and embrittlement of RPV steels.The dislocation density(ρ)is known to affect strongly the mechanical properties of RPV steels.The dislocation density of three commercial SA508 Gr.3 steels manufactured by different countries was thoroughly investigated by X-ray diffraction(XRD),electron backscattered diffraction(EBSD)and transmission electron microscopy(TEM).The dislocation densities of three SA508 Gr.3 steels calculated by XRD are as high as 1013 m-2 and consistent with results of tempered steels reported in prior studies.The results calculated by XRD match qualitatively with those obtained from TEM and kernel average misorientation(KAM)analysis of EBSD(EBSD-KAM).

作者: Hailong Liu Qiulin Li

作者单位: School of Material Science and Engineering,Tsinghua University,Beijing,China;Graduate School at Shen Graduate School at Shenzhen,Tsinghua University,Shenzhen,China

会议类型: 国际会议

会议名称: The 2nd International Symposium on Application of Materials Science and Energy Materials (SAMSE 2018) 第二届材料科学应用与能源材料国际研讨会2018年

会议地点: 上海

会议语种:英文

页码: 1-7

在线出版日期: 2018-12-17（万方平台首次上网日期，不代表论文的发表时间）