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
杨湘杰 1邓博焰 1邹伟峰 1宫梦奇1
作者信息
- 1. 南昌大学先进制造学院,南昌 330031;江西省高性能精确成形实验室,南昌 330031
- 折叠
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307 μm减小到86 μm,腐蚀质量损失速率由0.781 7×10-4 g/(cm2·h)下降到0.321 4×10-4 g/(cm2·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.
Abstract
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 307 μm to 86 μm,and the corrosion weight loss rate is decreased from 0.781 7×10-4 g/(cm2·h)to 0.321 4×10-4 g/(cm2·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Key words
Ti-Al Intermediate Alloy/Microstructure/Refine Grain/Corrosion Resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据