THERMAL STABILITY OF THE MECHANICALLY ALLOYED Al－10Ti NANOCRYSTALLINE ALLOY DURING CONSOLIDATION PROCESS
(School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 15000l)
Abstract: Nanocrystalline Al-10Ti alloy powder was prepared by mechanical alloying.The processed powder was then consolidated by hot pressing and hydrostatic extrusion.The grain size of milled powders and consolidated materials was determined by analyzing the broadening of the X-ray diffraction peaks and by TEM observation.The results showed that vacuum hot pressing led to larger grain size than simple annealing of the powders,and that hot hydrostatic extrusion led to more serious grain growth than hot pressing at the same temperature.
Key words: nanocrystalline Al-10Ti alloy consolidation process thermal stability