Ti-25Al-14Nb-2Mo-1Fe合金高温力学性能研究  

High Temperature Mechanical Properties of Ti-25Al-14Nb-2Mo-1Fe Alloy

作　　者：程军[1] 毛勇[1] 

机构地区：[1]云南大学物理科学技术学院材料科学与工程系,云南昆明650091

出　　处：《热加工工艺》2012年第22期9-12,共4页Hot Working Technology

基　　金：云南省应用基础研究面上基金资助项目(2008CD075)

摘　　要：通过加入第四组元β相稳定元素Fe和Mo来替代部分Nb元素制备Ti-25Al-14Nb-2Mo-1Fe合金。结果表明,较参比材料Ti-22Al-27Nb合金,Ti-25Al-14Nb-2Mo-1Fe合金的瞬时蠕变应变、1%蠕变时间和稳态蠕变速率均得到较大改善,并且自扩散激活能也得到提高;该合金在650℃高温条件下,具有较好的力学性能。Ti-25Al-14Nb-2Mo-lFe alloy was prepared by adding the quaternary B-phase stabilizing element Fe and Mo in substitution for a part of Nb in Ti2A1Nb based alloy. The results indicate that the transient creep strain, the steady state creep rate and 1% creep strain lifetime of the alloy are obviously improved in comparison with that of Ti-22A1-27Nb alloy. The activation energy of self diffusion is also enhanced because of the addition of Mo and Fe. The alloy can exhibit excellent mechanical orooerties at 650 ℃.

关 键 词：TI2ALNB基合金 金属间化合物 高温力学性能 

分 类 号：TG115.25[金属学及工艺—物理冶金]