稳恒磁场对Mg-Y-Zn合金组织和耐腐蚀性能的影响  

Effects of Steady Magnetic Field on Microstructure and Corrosion Performance of Mg-Y-Zn Alloy

作　　者：张帅杰 张磊[1] ZHANG Shuai-jie;ZHANG Lei(School of Aeronautical Manufacture Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2021年第2期61-66,73,共7页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：江西省自然科学基金(20181BAB206005);南昌航空大学研究生创新专项(YC2020-019)。

摘　　要：将稳恒磁场作用于Mg_(95.5)Y_(3)Zn_(1.5)合金的凝固过程,研究了稳恒磁场对合金凝固组织和耐腐蚀性能的影响。结果表明:经稳恒磁场处理后,Mg_(95.5)Y_(3)Zn_(1.5)合金的晶粒明显细化,18R-LPSO相的分布变得更为均匀,其体积分数也显著降低。稳恒磁场处理能够提高合金的耐腐蚀性能。随着磁场强度的增加,试样在3.5%NaCl溶液中的腐蚀质量损失速率逐渐降低,表明合金耐腐蚀性能逐渐提高。经0.9 T的稳恒磁场处理后合金的耐腐蚀性能显著提高,这可归因为LPSO相含量的降低和形成了较强的{0002}基面织构。The effects of steady magnetic field on the solidification microstructure and corrosion performance of Mg_(95.5)Y_(3)Zn_(1.5) alloy were studied in the present work.The results show that,compared with the alloy without steady magnetic field treatment,the microstructure of the alloy treated by steady magnetic field is refined,and the volume fraction of the 18R-LPSO phase is reduced.The steady magnetic field treatment is beneficial to the corrosion resistance improvement of Mg_(95.5)Y_(3)Zn_(1.5) alloy.With increasing magnetic field intensity,the corrosion rate of the alloys is gradually decreased.The improving of the corrosion resistance of the alloy with 0.9 T steady magnetic field treatment is more remarkable,which is attributed to the effects of the reduction of LPSO phase and the formation of{0002}basal texture.

关 键 词：稳恒磁场 Mg_(95.5)Y_(3)Zn_(1.5)合金 组织 耐腐蚀性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]