Ti-Al中间合金对AZ91D镁合金组织及腐蚀性能的影响  

Effects of Ti-Al Intermediate Alloy on Microstructure and Corrosion Performance of AZ91D Alloy

作　　者：杨湘杰[1,2] 邓博焰 邹伟峰 宫梦奇 Yang Xiangjie;Deng Boyan;Zou Weifeng;Gong Mengqi(School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031;Jiangxi ProvinceHigh Performance Precision Forming Laboratory,Nanchang 330031)

机构地区：[1]南昌大学先进制造学院,南昌330031 [2]江西省高性能精确成形实验室,南昌330031

出　　处：《特种铸造及有色合金》2024年第5期577-582,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(13008226)。

摘　　要：以纯Al、Ti为原料,使用真空熔炼炉在氩气氛围中制备了Ti-Al中间合金。采用XRD、OM、SEM等分析方法,研究了Ti-Al中间合金添加量对AZ91D镁合金晶粒细化效果及腐蚀性能的影响。结果发现,当Ti含量为0.1%(质量分数,下同)时,AZ91D的平均晶粒尺寸从307μm减小到86μm,腐蚀质量损失速率由0.7817×10^(-4)g/(cm^(2)·h)下降到0.3214×10^(-4)g/(cm^(2)·h),但添加过量的Ti元素(1%)并不会进一步细化晶粒和提高AZ91D合金耐腐蚀性能。Ti-Al intermediate alloy was prepared using pure Al and Ti as raw materials by vacuum melting furnace under argon atmosphere.XRD,OM and SEM were utilized to systematically investigate effects of Ti-Al intermediate alloy contents on grain refinement and corrosion performance of AZ91D magnesium alloy.The results indicate when Ti content is 0.1%,the average grain size of AZ91D is decreased from 307μm to 86μm,and the corrosion weight loss rate is decreased from 0.7817×10^(−4) g/(cm^(2)·h)to 0.3214×10^(−4) g/(cm^(2)·h).Nevertheless,excessive addition of Ti(>1%)cannot further refine the grain size or improve the corrosion resistance of the AZ91D alloy.

关 键 词：Ti-Al中间合金 显微组织 细化晶粒 耐腐蚀性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]