高压作用下AZ91D镁合金微观组织的演化  

Microstructures Evolution of AZ91D Magnesium Alloys under High Pressure

作　　者：刘秋香[1] 蒋智梅[1] 谢仕芳[1] 陆德平[1] Liu Qiuxiang, Jiang Zhimei, Xie Shifang, Lu Deping(Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials, Jiangxi Academy of Science)

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》2018年第9期942-945,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51201075)

摘　　要：以AZ91D镁合金为研究对象,借助X射线衍射仪、金相电镜、场发射扫描电镜及透射电镜,研究了压力对AZ91D镁合金微观组织的影响。结果表明,高压时效处理后的AZ91D镁合金仍由α-Mg和β-Mg17Al12相组成,但高压时效处理可改变β-Mg17Al12相的形态及分布,并且明显细化AZ91D镁合金的晶粒组织。The effects of pressure on microstructures of AZ91 D magnesium alloys were investigated through X-ray diffraction（XRD）,optical microscope（OM）,field emission scanning electron microscope（FESEM）and transmission electron microscope（TEM）.The results show that,AZ91 D magnesium alloys still consist ofα-Mg andβ-Mg17 Al12 phase after high pressure aging treatment.However,high pressure aging treatment can transform the morphology and distribution ofβ-Mg17 Al12 phase.Moreover,high pressure aging treatment can refine grain size significantly.

关 键 词：镁合金 显微组织 高压 时效处理 

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