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

Author:

Yi Feng1,Cai Xiao Lan1,Zhou Lei1,Yu Ming Jun1,Li Zheng1,Jiang Qing Wei1

Affiliation:

1. Kunming University of Science and Technology

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.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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