MANUFACTURING OF TiAL BASED ALLOY THROUGH ELEMENTAL POWDER PROCESS
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Graphical Abstract
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Abstract
The theory, process and properties of TiAl based alloy by elemental P/M method have been described in this article. The reaction of elemental Ti, Al at certain temperature is diffusion controlled, including intermediate steps in which TiAl3 and TiAl2 phases form. The methods of elemental powder process of TiAl based alloy include:reaction sintering, hot pressing, HIP of elemental Ti,Al powders, hot explosion synthesis, elemental Ti, al foil metallurgy etc. These, methods can fabricate TiAl based alloys with fine, homogeneous microstructure, while their mechanical properties are deteriorated by high content of impurities and flaw.
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