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In Situ Diffraction Experiments for the Investigation of Phase Fractions and Ordering Temperatures in Ti‐44 at% Al‐(3‐7) at% Mo Alloys
Author(s) -
Schmoelzer Thomas,
Mayer Svea,
Sailer Christian,
Haupt Frank,
Güther Volker,
Staron Peter,
Liss KlausDieter,
Clemens Helmut
Publication year - 2011
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201000263
Subject(s) - intermetallic , materials science , ternary operation , diffraction , phase (matter) , thermodynamics , phase diagram , volume fraction , synchrotron radiation , calphad , work (physics) , electron diffraction , crystallography , metallurgy , alloy , composite material , chemistry , optics , physics , organic chemistry , computer science , programming language
Being a strong β stabilizer, Mo has gained importance as an alloying element for so‐called β/γ‐TiAl alloys. Intermetallic TiAl‐based alloys which contain a significant volume fraction of the body‐centered cubic β‐phase at elevated temperatures have proven to exhibit good processing characteristics during hot‐working. Unfortunately, the effect of Mo on the appearing phases and their temperature dependence is not well known. In this work, sections of the Ti‐Al‐Mo ternary phase diagram derived from thermodynamic calculations as well as experimental data are presented. The phase transition temperatures stated in these phase diagrams are compared with the results of high‐temperature diffraction studies using high‐energy synchrotron radiation. Additionally, the disordering temperature of the β o ‐phase is determined.