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用机械合金化（ＭＡ）工艺制备了Ａｌ－１２Ｔｉ－６Ｎｂ合金，对其物相组成和显微组织进行了ＸＲＤ、电子探针和金相分析与观察，测试了其室温力学性能，并用ＳＥＭ观察了断口形貌。结果表明：ＭＡＡｌ－１２Ｔｉ－６Ｎｂ合金中生成了粗细不均的Ａｌ３Ｔｉ金属间化合物粒子，但未形成Ａｌ３Ｎｂ；在较大的Ａｌ３Ｔｉ颗粒中心遗留了岛状的α－Ｔｉ核；材料保留了颗粒球磨形成的层片状组织特征，盘状的Ａｌ３Ｔｉ和Ｎｂ趋向于平行热压面分布。Ｎｂ的加入使合金较好地发挥了大个Ａｌ３Ｔｉ和盘状Ｎｂ颗粒的协同补强增韧作用，三点弯曲强度、弹性模量、比强度、比模量和断裂应变均比同种工艺条件下制备的ＭＡＡｌ－１２Ｔｉ有显著提高。
Al-12Ti-6Nb alloy was prepared by mechanical alloying (MA) process. The phase composition and microstructure of the alloy were characterized by XRD, electron probe and metallographic analysis. The mechanical properties at room temperature were tested and SEM observations The fracture appearance. The results show that the Al3Ti intermetallic compound particles with uneven thickness are formed in the MAAl-12Ti-6Nb alloy, but Al3Nb is not formed. The island-shaped α-Ti nuclei remain in the center of the larger Al3Ti particles. Lamellar structure, disc-shaped Al3Ti and Nb tend to parallel hot surface distribution. The addition of Nb enhanced the synergistic toughening and toughening effect of Al3Ti and discoid Nb particles. The three-point bending strength, elastic modulus, specific strength, specific modulus and fracture strain were all better than the same processing conditions Under the prepared MAAl-12Ti significantly increased.