The microstructures and corrosion behavior of 1.0wt%Gd-containing neutron-absorbing duplex stainless steel annealed at different temperatures were studied.Results reveal that the content of Gd-containing secondary pha...The microstructures and corrosion behavior of 1.0wt%Gd-containing neutron-absorbing duplex stainless steel annealed at different temperatures were studied.Results reveal that the content of Gd-containing secondary phase increases with increasing the annealing temperatures to 1080℃,and then decreases.In the sample annealed at 1080℃,M-Gd(M=Fe,Cr,Ni)intermetallic with M_(3)Gd as the core phase and M_(12)Gd as the shell is the primary secondary phase.In the sample annealed at 1140℃,M_(3)Gd phase is dominant.The corrosion behavior of the two annealed steel samples were analyzed in NaCl,HCl and H_(3)BO_(3) solutions.It is found that the sample annealed at 1140℃ has lower corrosion rate.M_(3)Gd is more electrochemically active than M_(12)Gd when the sample is immersed in NaCl and HCl solutions,but more noble in H_(3)BO_(3) solution.展开更多
基金Research Foundation of Shenyang National Laboratory for Materials Science(L2019F15)Ling Chuang Research Project of China National Nuclear Corporation(CNNC-LCKY-202279)。
文摘The microstructures and corrosion behavior of 1.0wt%Gd-containing neutron-absorbing duplex stainless steel annealed at different temperatures were studied.Results reveal that the content of Gd-containing secondary phase increases with increasing the annealing temperatures to 1080℃,and then decreases.In the sample annealed at 1080℃,M-Gd(M=Fe,Cr,Ni)intermetallic with M_(3)Gd as the core phase and M_(12)Gd as the shell is the primary secondary phase.In the sample annealed at 1140℃,M_(3)Gd phase is dominant.The corrosion behavior of the two annealed steel samples were analyzed in NaCl,HCl and H_(3)BO_(3) solutions.It is found that the sample annealed at 1140℃ has lower corrosion rate.M_(3)Gd is more electrochemically active than M_(12)Gd when the sample is immersed in NaCl and HCl solutions,but more noble in H_(3)BO_(3) solution.
