Ta对Ti_2AlNb基合金微观组织和高温性能的影响  

Effect of Ta on microstructures and high temperature tensile properties for Ti_2AlNb based alloys

作　　者：彭继华[1] 李世琼[2] 毛勇[2] 孙训方[1] 

机构地区：[1]西南交通大学工程力学系,成都610031 [2]钢铁研究总院高温材料研究所,北京100081

出　　处：《中国有色金属学报》2000年第S1期50-54,共5页The Chinese Journal of Nonferrous Metals

摘　　要：对Ti Al Nb Ta系列合金的组织结构、高温拉伸力学性能进行了研究。结果表明 ,合金中Ta替代部分Nb ,提高了合金的 β/B2转变点温度 ,有利于细化合金的微观组织结构 ;随着Ta含量增加 ,Ti2 AlNb基合金在650℃的屈服强度增加。The microstructures and elevated temperature tensile properties of Ti_2AlNb based alloys were studied systematically. The results show that the B2 transus temperatures of Ti_2AlNb based alloys are increased by substituting a part of Nb with Ta. Addition of Ta is beneficial to refining the microstructures of Ti_2AlNb based alloys. The tensile yield strength at 650 ℃ is increased with increasing amount of Ta for Ti_2AlNb based alloys.

关 键 词：金属间化合物 Ti₂AlNb基合金 微观组织 高温力学性能 

分 类 号：TG14[一般工业技术—材料科学与工程]