富Al的Al-Ti系的机械合金化  

MECHANICAI ALLOYING ON Al-RICH Al-Ti ALLOY

作　　者：王谦[1] 张寿柏[1] 胡赓祥[2] 孙卫权[3] 吴菊清[3] 

机构地区：[1]上海交通大学信息存储研究中心,上海200030 [2]上海交通大学材料科学系 [3]机械工业部上海材料研究所

出　　处：《上海有色金属》1998年第1期1-7,共7页Shanghai Nonferrous Metals

摘　　要：本文研究了富Ａｌ的Ａｌ－Ｔｉ混合粉末在球磨过程中的结构演变过程。研究结果表明球磨机的类型即球磨输入能量对混合粉末的结构变化有很大影响，球磨输入能量决定最终球磨态粉末的畸变程度和晶粒大小。输入能量高的球磨方式能导致Ｔｉ完全地过饱和固溶于Ａｌ中，甚至有部分非晶相和ＬＩ_２有序相的形成。中等输入能量只能形成过饱和固溶体，而输入能量较低就不能使Ａｌ－Ｔｉ完全过饱和固溶，更不能形成非晶相。利用ＧＮ－２型球磨机制备的机械合金化Ａｌ－Ｔｉ粉末的畸变明显高于另外两种球磨机制备的粉末，旦晶粒最细。高的畸变和细的晶粒可能是合金部分非晶化的原因之一。Milling experiments had been conducted on the powder mixture of Al-12at%Ti by using three kinds of high energy milling machines with different imput energies. The results show that the structure evolution of the milling powder depends on the type of machine used (i. e. imput energy). The imput energy of the miller is also the determinant factor of the internal strain and the grain size of the final as-milled powder. Ti can be completely super-saturately dissolved into Al by using miller with high imput energy and some LI_2 ordered phase and amor- phous phase can also be found after longer time milling. Only supersaturated solid solution formed with medium imput energy, no LI_2 phase or amorphous phase were formed. While rela- tively low imput energy milling cannot make Ti completely soluble in AI. In fact, MA A1-Ti powders prepared by miller with highest imput energy have the highest strain and finest grain size, which may result in the amorphizing transition.

关 键 词：无序化 非晶化 机械合金化 铝合金 球磨 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TF11[金属学及工艺—金属材料]