Paper Title:

Phase Transition and Ordering Temperatures of TiAl-Mo Alloys Investigated by In Situ Diffraction Experiments

Periodical Materials Science Forum (Volumes 654 - 656)
Main Theme PRICM7
Edited by Jian-Feng Nie and Allan Morton
Pages 456-459
DOI 10.4028/www.scientific.net/MSF.654-656.456
Citation Thomas Schmoelzer et al., 2010, Materials Science Forum, 654-656, 456
Online since June, 2010
Authors Thomas Schmoelzer, Svea Mayer, Frank Haupt, Gerald A. Zickler, Christian Sailer, Lars Lottermoser, Volker Güther, Klaus Dieter Liss, Helmut Clemens
Keywords Diffraction, Phase Diagram, Phase Transformation, Thermodynamic Calculation, TiAl
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Abstract

Intermetallic TiAl alloys with a significant volume fraction of the body-centered cubic β-phase at elevated temperatures have proven to exhibit good processing characteristics during hot-working. Being a strong β stabilizer, Mo has gained importance as an alloying element for so-called β/γ-TiAl alloys. Unfortunately, the effect of Mo on the appearing phases and their temperature dependence is not well known. In this work, two sections of the Ti-Al-Mo ternary phase diagram derived from experimental data are shown. These diagrams are compared with the results of in-situ high-temperature diffraction experiments using high-energy synchrotron radiation.