Mo、V和Ag对粉末冶金Ti-5Al合金组织与力学性能的影响  

Effects of Mo,V and Ag additions on microstructure and mechanical properties of powder metallurgy Ti-5Al alloy

作　　者：肖代红[1] 杨宝刚[1] 申婷婷[1] 袁铁锤[1] 贺跃辉[1] 王守仁[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国有色金属学报》2011年第6期1265-1271,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金创新研究群体科学基金资助项目(51021063);国家杰出青年科学基金资助项目(50825102);粉末冶金国家重点实验室创新基金资助项目(PM2010);中国博士后科学基金特别资助项目(200801348);湖南省科技计划博士后专项资助项目(2009RS3025)

摘　　要：采用元素混合法制备粉末冶金Ti-Al-Mo-V-Ag合金,通过金相观察、扫描电镜及力学性能测试等方法研究Mo、V和Ag的添加及烧结温度对Ti-5Al合金的烧结行为、显微组织与力学性能影响,并对其作用机制进行探讨。结果表明:1 350℃烧结时,V与Mo的添加能改善烧结合金的压缩强度,单独添加Ag时,则降低基体合金的综合性能,但当Ag与Mo、V同时添加到基体合金中时,改变合金的显微组织,提高烧结合金的致密度与抗压缩强度,致密度能达到96%,抗压缩强度达到1 782 MPa。同时,烧结温度不同时,相同成分的粉末冶金Ti-5Al合金的显微组织与性能也表现出不同的特征。The powder metallurgy（P/M） Ti-Al-Mo-V-Ag alloys were processed by powder metallurgy using the blended elemental（BE） technique.The effects of Mo,V and Ag additions and sintering temperature on the microstructures and mechanical properties of the Ti-5Al alloys were investigated using optical microscope,scanning electron microscope and mechanical properties tests.The results show that adding Mo or V elements improves the compression strength of the based alloys after sintering at 1 350 ℃,and Ag element addition decreases the properties of Ti-5Al alloy.However,adding Ag element with Mo and V elements increases the density and compressive strength of P/M Ti-5Al alloy.The relative density and compressive strength of the Ti-5Al-4Mo-4V-5Ag alloy are 96% and 1 782 MPa,respectively.Moreover,the sintering temperature also affects the microstructures and properties of the PM Ti-5Al based alloys.

关 键 词：钛合金 微合金化 烧结温度 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]