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采用机械合金化制备Ti-6Al-4V粉末。结果表明:采用机械合金化可以制备纳米晶Ti-6Al-4V合金粉,其反应机理以扩散为主,该固态反应是缺陷能和碰撞能共同作用的结果;随球磨时间延长,部分V固溶于Ti中形成置换固溶体Ti(V),球磨过程中没有中间相生成。球磨40 h后都能获得纳米晶,60 h的粉末为纳米晶和非晶的混合物,晶粒尺寸小于60 nm;60 h后晶粒尺寸变化缓慢。球磨后Ti、Al、V的原子比近似为90:6:4,与Ti-6Al-4V元素成分一致。
Ti-6Al-4V powder was prepared by mechanical alloying. The results show that nano-crystalline Ti-6Al-4V alloy powder can be prepared by mechanical alloying and its reaction mechanism is dominated by diffusion. The solid state reaction is the result of the interaction of defect energy and collision energy. With the ball milling time prolonged, The formation of Ti in the replacement of solid solution Ti (V), no mesophase during ball milling. After milling for 40 h, nanocrystals were obtained. The powders for 60 h were a mixture of nanocrystalline and amorphous grains with a grain size of less than 60 nm. The grain size changed slowly after 60 h. The atomic ratio of Ti, Al and V after ball milling is approximately 90: 6: 4, which is consistent with that of Ti-6Al-4V.