Hostname: page-component-745bb68f8f-g4j75 Total loading time: 0 Render date: 2025-01-12T12:47:44.027Z Has data issue: false hasContentIssue false
  • English
  • Français

Ordering and disordering of β/βo-phase in γ-TiAl based alloys investigated by neutron diffraction

Published online by Cambridge University Press:  07 February 2017

Victoria Kononikhina ,
Andreas Stark ,
Weimin Gan ,
Andreas Schreyer  and
Florian Pyczak
Victoria Kononikhina*
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, Germany
Andreas Stark
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, Germany
Weimin Gan
Affiliation:
German Engineering Materials Centre at MLZ, Helmholtz-Zentrum Geesthacht, Garching, Germany
Andreas Schreyer
Affiliation:
European Spallation Source ERIC, Lund, Sweden
Florian Pyczak
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Geesthacht, Germany
*
*(Email: [email protected])
Get access

Abstract

TiAl based alloys are desirable materials for turbine blades in aircraft engines. Depending on alloy composition and temperature additionally disordered β-Ti(Al) (A2 structure) or ordered βo-TiAl (B2 structure) can occur. Unfortunately little is known about the exact order/disorder transformation temperatures of β/βo.

We used the good contrast of neutron diffraction for ordering and disordering of TiAl alloys to determine the order/disorder temperatures, which are not accessible by other methods like DSC measurements. Several binary TiAl alloys as well as alloys with additional alloying elements were used to investigate the influence of different Al concentrations and alloying additions on the occurring ordering/disordering reactions and phase transformations. As a result ordered βo phase was found only in selected ternary alloys.

Keywords

microstructurescanning electron microscopy (SEM)neutron scattering
Type
Articles
Information
MRS Advances , Volume 2 , Issue 26: Mechanical Behavior and Failure Mechanisms of Materials , 2017 , pp. 1399 - 1404
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Appel, F., Paul, J.D.H., Oehring, M., Gamma Titanium Aluminide Alloys: Science and Technology, (Wiley-VCH, Weinheim 2011).Google Scholar
Bewlay, B.P., Nag, S., Suzuki, A., Weimer, M.J., Mater High Temp 33, 549 (2016).Google Scholar
Mayer, S., Petersmann, M., Fischer, F.D., Clemens, H., Waitz, T., Antretter, T., Acta Mater. 115, 242 (2016).CrossRefGoogle Scholar
Rackel, M.W., Stark, A., Gabrisch, H., Schell, N., Schreyer, A., Pyczak, F., Acta Mater. 121, 343 (2016).Google Scholar
Witusiewicz, V.T., Bondar, A.A., Hecht, U., Velikanova, T.Y., J Alloy Compd. 472, 133 (2009).Google Scholar
Witusiewicz, V.T., Bondar, A.A., Hecht, U., Voblikov, V.M., Fomichov, O.S., Petyukh, V.M., Rex, S., Intermetallics 19, 234 (2011).Google Scholar
Witusiewicz, V.T., Bondar, A.A., Hecht, U., Rex, S., Velikanova, T.Y., J Alloy Compd. 465, 64 (2008).Google Scholar
Watson, I.J., Liss, K.-D., Clemens, H., Wallgram, W., Schmoelzer, T., Hansen, T.C., Reid, M., Adv. Eng. Mater. 11, 932 (2009).Google Scholar
Erdely, P., Schmoelzer, T., Schwaighofer, E., Clemens, H., Staron, P., Stark, A., Liss, K.-D., Mayer, S., Metals 6,10 (2016).Google Scholar
Randau, C., Garbe, U., Brokmeier, H.-G., J. Appl. Cryst. 44, 641 (2011).Google Scholar
Lutterotti, L., Bortolotti, M., Ischia, G., Lonardelli, I., Wenk, H.-R., Z. Krist. 26, 125 (2007).Google Scholar