球磨时间对机械合金化Al-8Ti合金组织的影响

Effect of Milling Time on the Microstructure of theAl_8Ti Alloy Prepared by Mechanical Alloying

采用机械合金化方法制备Ａｌ－Ｔｉ合金时，球磨时间影响粉体的粒度、结构和相组成，从而影响合金成型后的组织结构与性能。经过足够长时间球磨后，Ａｌ、Ｔｉ混合粉转变为单一Ａｌ（Ｔｉ）过饱和固溶体，且颗粒细小均匀；成型后可获得Ａｌ基体上弥散分布细小Ａｌ３Ｔｉ颗粒的Ａｌ－Ｔｉ合金。

The microstructure and properties of mechanical alloyed Al-Ti alloy are influenced by the particle size, structure and phases of the powders after different milling time. Under the same hot pressing conditions, the ideal microstructure, i. e. fine Al_3Ti particles dispersed within Al matrix, can be achieved by using asmilled single Al(Ti) supersolid solution powders with fine particle sizes.