Nb 含量对 Ti_3Al+Ti_5Si_3 双相合金的影响

The Effect of Nb Content on Ti3Al+Ti5Si3 Dual Phase Alloys

研究了Ｎｂ含量对Ｔｉ３Ａｌ＋Ｔｉ５Ｓｉ３双相合金组织和性能的影响．结果表明，随着Ｎｂ原子含量从０增加到２０％，合金的组织形貌变化不大，仅在Ｎｂ含量为１０％时，出现网篮状组织．合金在室温下的断裂强度以及基体的显微硬度均随Ｎｂ含量的增多而增大．加入１０％Ｎｂ的双相合金其综合性能最好．

The effect of Nb on microstructure and properties of Ti3Al+Ti5Si3 dualphase alloys has been studied;it indicates that with the Nb content′s increasing from 0 to 20%,the morphology of the alloy microstructure remains almost the same and the basketweave microstructure is observed in the primary phase of the dualphase alloy with 10% Nb.The fracture strength of the alloy under room temperature and microhardness of the matrix increase significantly with the Nb content′s increasing.The Ti3Al+Ti5Si3 alloy with 10% Nb has the best comprehensive properties.