摘要
TiAl alloy was prepared by intense plastic deformation and subsequent reaction sintering. The effect of plastic deformation on the microstructure of sintered TiAl alloy was investigated using energy dispersive X ray spectroscopy (EDS), optical microscopy and transmission electron microscopy (TEM). The results show that the intense plastic deformation of reacting Ti and Al phases caused by high energy ball milling refines the as sintered microstructure. The longer the milling time, the finer the grain size of γ and lamellar ( α 2 + γ ) phases. The finer grain size improves the properties of the TiAl alloy. It is also found that the volume fraction of lamellar ( α 2 + γ ) phases increases first, then decreases with increasing milling time. Based on the experimental results theoretical discussion was presented.
TiAl alloy was prepared by intense plastic deformation and subsequent reaction sintering. The effect of plastic deformation on the microstructure of sintered TiAl alloy was investigated using energy dispersive X ray spectroscopy (EDS), optical microscopy and transmission electron microscopy (TEM). The results show that the intense plastic deformation of reacting Ti and Al phases caused by high energy ball milling refines the as sintered microstructure. The longer the milling time, the finer the grain size of γ and lamellar ( α 2 + γ ) phases. The finer grain size improves the properties of the TiAl alloy. It is also found that the volume fraction of lamellar ( α 2 + γ ) phases increases first, then decreases with increasing milling time. Based on the experimental results theoretical discussion was presented.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2002年第4期621-624,共4页
Transactions of Nonferrous Metals Society of China
基金
Project ( 5 9875 0 15 )supportedbytheNationalNaturalScienceFoundationofChina
