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Recently, we reported a novel approach for grain refinement of TiAl alloys by cyclic heat treatment (CHT) only. Different from our previous studies involving fast cooling, in this study, an alternative CHT route is provided for grain refinement under relatively slow cooling. It is particularly shown that a coarse fully lamellar structure can be refined to a fine one with a size of ~30 μm. The underlying...
Recently, we reported a method for grain refinement of TiAl alloys by cyclic heat treatment (CHT) only. However, the final microstructure appeared inhomogeneous, containing grains of different sizes. In this study, a modified route is provided for grain refinement including a heat treatment step just below the α transus temperature. It is particularly shown that a coarse fully lamellar structure can...
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