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Yttria is the best face coat material in the shell mold for the investment casting of γ-TiAl alloys. However, yttria inclusions may occur in the cast products and there is a lack of knowledge about the influence of yttria inclusions on the mechanical properties of TiAl. In the present study, the effect of yttria inclusions on room temperature tensile properties of two investment cast TiAl alloys,...
Room temperature tensile ductility of extruded Ti-47Al-1.5Nb-1Cr-1Mn-0.5B (at.%) with different surface topographies was investigated. Tensile specimens were subjected to grinding with sandpaper of different grits and electrolytic polishing to achieve different surface topographies. Surface morphology/topography and tensile ductility of different surface preparations were compared. Results show that...
Textures of α2 and γ phases in Ti–47Al–2Cr–2Nb–0.15B (at.%) rectangular billet, extruded below its α transus temperature, were evaluated and their relation to the mechanical properties of TMTL microstructure was investigated. Strong α2 phase texture {112¯0}<101¯0> was found after extrusion and it evolved into {101¯0}<112¯0> recrystallization texture via oriented growth during α solution...
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