In-situ neutron diffraction study of thermal phase stability in a gamma-TiAl based alloy doped with Mo and/or C

0433661 - ÚJF 2015 RIV GB eng J - Journal Article
Beran, Přemysl - Petrenec, M. - Heczko, Milan - Smetana, B. - Žaludová, M. - Šmíd, Miroslav - Kruml, Tomáš - Keller, L.
In-situ neutron diffraction study of thermal phase stability in a gamma-TiAl based alloy doped with Mo and/or C.
Intermetallics. Roč. 54, NOV (2014), s. 28-38. ISSN 0966-9795. E-ISSN 1879-0216
R&D Projects: GA ČR(CZ) GAP107/11/0704
Institutional support: RVO:68081723 ; RVO:61389005
Keywords : Titanium aluminides based on TiAl * order / disorder transformations * phase diagrams * site occupancy * diffraction * aero-engine components
Subject RIV: BM - Solid Matter Physics ; Magnetism; JL - Materials Fatigue, Friction Mechanics (UFM-A)
Impact factor: 2.131, year: 2014

n-situ heating/cooling neutron diffraction experiments were performed on a gamma-TiAl based alloy doped with Mo and/or C. The structural analysis was complemented by differential scanning calorimetry and electron microscopy. Description of high temperature alpha phase with new model of partially disordered alpha(2)'-Ti3Al phase instead of a fully disordered alpha-Ti is proposed. The atomic redistribution in the gamma phase is related to a wide alpha-transus signal on the DSC curves. Sections of temperature phase stability diagrams constructed from diffraction data for heating and cooling are presented.
Permanent Link: http://hdl.handle.net/11104/0237889