高压下时效时间对AZ91D镁合金组织及耐蚀性的影响  

Effect of High Pressure Aging Time on Microstructures and Corrosion Resistance of AZ91D Magnesium Alloys

作　　者：刘秋香[1] 陆德平[1] 谢仕芳[1] 刘克明[1] 杨艳玲[1] 余玖明[1] 

机构地区：[1]江西省科学院江西省铜钨新材料重点实验室

出　　处：《特种铸造及有色合金》2015年第8期789-792,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51201075);江西省科学院博士基金资助项目(2012-YYB-05);2013年江西省科学院创新专项资助项目(2013-XTPH1-20)

摘　　要：以AZ91D镁合金为研究对象,借助X射线衍射仪、金相显微镜、扫描电镜及电化学工作站,研究了在1GPa压力下,时效时间对AZ91D镁合金组织及耐腐蚀性能的影响。结果表明,随着时效时间延长,AZ91D镁合金孪晶数量先增加后减小,在孪晶交截区及孪晶晶界处出现了大量的动态再结晶晶粒。时效时间为60min时,AZ91D镁合金晶粒组织细小均匀,此时其耐腐蚀性能最好。Effects of aging time on microstructures and corrosion resistance of AZ91 D magnesium alloys were investigated under 1GPa through XRD（X-ray diffraction）,OM（optical microscopy）,SEM（scanning electron microscopy）and polarization curves.The results show that,with aging time increase,the number of twin crystal is increased firstly and then decreased.Moreover,a mounts of dynamic recrystallization grains can be observed in twin boundaries and twin-intersection zone.After aging treatment for60 min,the grain size in AZ91 D magnesium alloys exhibits fine and uniform with the satisfied corrosion resistance.

关 键 词：AZ91D镁合金 时效时间 显微组织 耐腐蚀性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—金属材料]