Phase transition and ordering temperatures of TiAl-Mo alloys investigated by in-situ diffraction experiments

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. © 2020 by Trans Tech Publications Ltd.

Keywords

Phase diagrams, Phase transformations, Titanium, Thermodynamics, Diffraction, Molybdenum

Citation

Schmoelzer, T., Mayer, S., Haupt, F., Zickler, G. A., Sailer, C., Lottermoser, L., Guther, V., Liss, K. D., & Clemens, H. (2010). Phase transition and ordering temperatures of TiAl-Mo alloys investigated by in-situ diffraction experiments. 7th Pacific Rim International Conference on Advanced Materials and Processing (PRICM-7), 2nd – 6th August 2010. Cairns Convention Centre: Cairns, Australia. In Nie, J. F. & Morton, A. (Eds.), Materials Science Forum, 654-656, 456-459. doi:10.4028/www.scientific.net/MSF.654-656.456