Electron beam melting of a β-solidifying intermetallic titanium aluminide alloy

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The structural features of an electron-beam-melted titanium aluminide alloy are presented. The microstructure consisting of γ-TiAl, α 2-Ti 3Al, and β o-TiAl reveals inhomogeneous phase and Al distributions, which are quantified by electron probe microanalysis. Electron backscatter diffraction is utilized to indicate a solidification via the β-phase preferably along the <001> direction, resulting in a {001} βo fiber texture parallel to the building direction. These findings are correlated to a calculated isopleth section of the Ti-Al-Nb-Mo system and the corresponding phase fraction diagram. The investigated β-solidifying γ-TiAl-based alloy, therefore, combines both the characteristics of electron-beam-melted Ti and TiAl alloys.


Original languageEnglish
Article number1900800
JournalAdvanced Engineering Materials
Issue number12
Publication statusPublished - 1 Dec 2019