神马文学网电场处理对GH3044合金腐蚀行为的影响
来源：百度文库 编辑：神马文学网 时间：2024/04/29 06:10:43
EFFECTS OF ELECTRIC FIELD TREATMENT ON CORROSION BEHAVIOR OF GH3044 SUPERALLOY
LIU Yang, WANG Lei, LI Weitao, WANG Fuqiang Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819 Electric field treatment was performed on one of nickel-base superalloy GH3044 and the effects of electric field treatment on the microstructure and corrosion behavior of the alloy were investigated. The results show that the intergranular corrosion resistance of the alloy is improved by the electric field treatment and the intergranular corrosion rate decreases with the increasing treatment time. The intergranular corrosion rate is 2.06 mm/a when the alloy is electric field treated under the condition of 800 ℃ and 6.4 kV/cm for 10 h, and the decreasing extent reaches 37.33 % compared with the alloy untreated. The formation of the annealing twins during the electric field treatment cause the redistribution of atoms of the crossings between the original high angle grain boundaries and the annealing twins. With the increase of electric field treated time, a large amount of original high angle grain boundaries are replaced and the continuous distribution of depletion network of the alloying element is separated, those lead to the retardation of the corrosion ditches to go forward. The intergranular corrosion resistance of the superalloy is improved due to the improving of intergranular corrosion behavior of the grain boundaries. Moreover, the promotion effect of electric field treatment on atom diffusion rate decrease the exhaustion tendency of Cr and Mo elements on both sides of normal high angle grain boundary. Those can be considered as the reasons of improving the corrosion resistance after electric field treatment. Keywords: corrosion electric field treatment superalloy twin
LIU Yang, WANG Lei, LI Weitao, WANG Fuqiang Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110819 Electric field treatment was performed on one of nickel-base superalloy GH3044 and the effects of electric field treatment on the microstructure and corrosion behavior of the alloy were investigated. The results show that the intergranular corrosion resistance of the alloy is improved by the electric field treatment and the intergranular corrosion rate decreases with the increasing treatment time. The intergranular corrosion rate is 2.06 mm/a when the alloy is electric field treated under the condition of 800 ℃ and 6.4 kV/cm for 10 h, and the decreasing extent reaches 37.33 % compared with the alloy untreated. The formation of the annealing twins during the electric field treatment cause the redistribution of atoms of the crossings between the original high angle grain boundaries and the annealing twins. With the increase of electric field treated time, a large amount of original high angle grain boundaries are replaced and the continuous distribution of depletion network of the alloying element is separated, those lead to the retardation of the corrosion ditches to go forward. The intergranular corrosion resistance of the superalloy is improved due to the improving of intergranular corrosion behavior of the grain boundaries. Moreover, the promotion effect of electric field treatment on atom diffusion rate decrease the exhaustion tendency of Cr and Mo elements on both sides of normal high angle grain boundary. Those can be considered as the reasons of improving the corrosion resistance after electric field treatment. Keywords: corrosion electric field treatment superalloy twin
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