Phase fractions, transition and ordering temperatures in TiAl-Nb-Mo alloys: an in- and ex-situ study.

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dc.contributor.authorSchmoelzer, Ten_AU
dc.contributor.authorLiss, KDen_AU
dc.contributor.authorZickler, GAen_AU
dc.contributor.authorWatson, IJen_AU
dc.contributor.authorDroessler, LMen_AU
dc.contributor.authorWallgram, Wen_AU
dc.contributor.authorBuslaps, Ten_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorClemens, Hen_AU
dc.date.accessioned2010-07-29T00:42:10Zen_AU
dc.date.available2010-07-29T00:42:10Zen_AU
dc.date.issued2010-08en_AU
dc.date.statistics2010-08en_AU
dc.description.abstractIntermetallic γ-TiAl based alloys of the TNM™ alloy family attain their excellent processing characteristics by a high β-phase content present at hot-working temperatures. Subsequent to hot-working the β-phase content is decreased by a heat treatment step performed at temperatures where the β-phase fraction exhibits a minimum. In this study, in- and ex-situ experiments were conducted on three alloys with different contents of β/β0 stabilizing elements. The course of phase fractions as a function of temperature as well as phase transition temperatures were determined by means of in-situ high-energy X-ray diffraction experiments. Additionally, dynamic scanning calorimetry investigations were performed to obtain complementary data on the transition temperatures. Quantitative metallography was conducted on heat treated and quenched specimens to acquire additional information on the dependence of the phase fractions on temperature. By neutron diffraction experiments the ordering temperatures of the constituent phases were determined. It was shown that the experiments yielded consistent results which differ significantly from ThermoCalc simulations for which a commercial TiAl database was used. The differences between the experimental results and the thermodynamic predictions are discussed. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationSchmoelzer, T., Liss, K. D., Zickler, G. A., Watson, I. J., Droessler, L. M., Wallgram, W., Buslaps, T., Studer, A., & Clemens, H. (2010). Phase fractions, transition and ordering temperatures in TiAl-Nb-Mo alloys: an in- and ex-situ study. Intermetallics, 18(8), 1544-1552. doi:10.1016/j.intermet.2010.04.008en_AU
dc.identifier.govdoc2046en_AU
dc.identifier.issn0966-9795en_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleIntermetallicsen_AU
dc.identifier.pagination1544-1552en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.intermet.2010.04.008en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1946en_AU
dc.identifier.volume18en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTitaniumen_AU
dc.subjectPhase transformationsen_AU
dc.subjectHeat treatmentsen_AU
dc.subjectAlloysen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectTemperature measurementen_AU
dc.titlePhase fractions, transition and ordering temperatures in TiAl-Nb-Mo alloys: an in- and ex-situ study.en_AU
dc.typeJournal Articleen_AU
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