Effect of Milling Time on Properties of Ti-48at%Al Composite Powder Prepared by High Energy Milling

Abstract:

The Ti-48at%Al composite powder was synthesized by high energy ball milling. The properties of the composite particles, such as medium diameter,Phase ,microstructure and components, were respectively investigated . Results show that, the phase evolution process can be described by: Ti+ Al fcc Ti (Al),TiAl,TiAl₃,Ti₃AlTiAl₃,Ti₃Alamorphous phase. After milling 3 hours, Fcc Ti (Al) solid solution, TiAl, TiAl₃, Ti₃Al were found. After milling 9 hours, the amorphous phase of Ti - 48 at % Al were produced. The element distribution of the mechanically alloyed Ti-48at%Al powder was close to the initial design composition after 5 h milling, but this distribution was inhomogeneous. Medium diameter (D₅₀) of Ti-48at%Al composite powder achieved the minimal size 9.56 μm after milling for 5hours.

• Periodical: Key Engineering Materials (Volumes 609-610)
• Pages: 185-190
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.609-610.185
• Online since: April 2014
• Authors: Feng Yi, Xiao Lan Cai*, Lei Zhou, Ming Jun Yu, Zheng Li, Qing Wei Jiang
• Keywords: Amorphous Phase, High-Energy Ball Milling (HEM), Mechanical Alloying, Microstructure, Ti-48at%Al Composite Powder, TiAl

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