@misc{gabrisch_impact_of_2023, 
author={Gabrisch, H.,Janovská, M.,Rackel, M.W.,Pyczak, F.,Stark, A.},
title={Impact of microstructure on elastic properties in the alloy Ti-42Al-8.5Nb},
year={2023},
howpublished = {journal article},
doi = {https://doi.org/10.1016/j.jallcom.2022.167578},
abstract = {The microstructure of a γ-TiAl alloy containing niobium undergoes continuous transformations during annealing at 550 °C. These take place within the α2-phase of lamellar (α2 +γ) colonies. We have characterized these changes by transmission electron microscopy and made a correlation to the elastic constants determined by resonant ultrasonic spectroscopy during in-situ annealing at the same temperature. The results show a continuous increase of the E-modulus. This can be attributed to elastic strains acting within α2 lamellae as a result of lattice transformations. After 5000 h, a thermodynamic equilibrium was established with equal fractions of α2-phase and O-phase that differ only in lattice symmetry and Nb content. Generally, the presence of O-phase should contribute to lower elastic moduli, however in the present case the evolving microstructural characteristics were responsible for the observed increase in the E-modulus.},
note = {Online available at: \url{https://doi.org/10.1016/j.jallcom.2022.167578} (DOI). Gabrisch, H.; Janovská, M.; Rackel, M.; Pyczak, F.; Stark, A.: Impact of microstructure on elastic properties in the alloy Ti-42Al-8.5Nb. Journal of Alloys and Compounds. 2023. vol. 932, 167578. DOI: 10.1016/j.jallcom.2022.167578}}