A study on the phase transformation of BCuAl9Fe4 alloy
Abstract
This paper’s aim is to describe the results of the phase transformation of BCuAl9Fe4 alloy after casting, quenching and aging. After casting, the microstructure of this alloy consists of α phase with grain size about 100 μm, mixture (α+γ) and the inter-metallic phase Fe3Al. However, the proportion of the α phase in the casting alloy is coarse. The alloy was heated at 850∘C for 2 h then quickly cooling in water. After quenching, the microstructure of alloy shows that the grain size reduced to about 40 μm. After quenching, the alloy was aged at 350∘C for 2 h, the martensite phase of this alloy decomposed into order phase (α+γ2) with fine grain size, dispersed in the matrix. The intermetallic phase was fine and evenly dispersed in the matrix. By TEM analysis, after heat treatment, the structure of martensite and the inter-metallic phase in this alloy which had small grain size were formed.
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