首页|Effect of electric current on secondary phase dissolution and elements migration behavior of a Ni-based single crystal superalloy
Effect of electric current on secondary phase dissolution and elements migration behavior of a Ni-based single crystal superalloy
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The second phase dissolution and elements migration behavior of a nickel-based single crystal superalloy during solution heat treatment with direct current were investigated for simplifying and shortening the solution heat treatment of the Ni-based single crystal superalloy.The results showed that the electric current solution heat treatment improved microstructural homogenization as well as the distribution of alloying elements,especially for the refractory metal W and Mo.The microsegregation ratios for Mo and W after electric current solution heat treatment at 1230 ℃ for 4 h are near those without electric current at 1250 ℃ for 4 h.The electric current accelerated the yphase dissolution process,and the yphase could be completely dissolved at a lower treatment temperature or within a shorter treatment time under electric current solution heat treatment with direct current.A microcosmic current model was proposed to analyze the effect of the electric current on the solution heat treatment of the Ni-based single crystal superalloy.
Ni-based single crystal superalloyElectric currentSolution heat treatmentElectromigrationElement segregation
Ying-ju Li、Ce Zheng、Xiao-hui Feng、Qiu-yan Huang、Tian-jiao Luo、Yuan-sheng Yang
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Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China
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