@article{5b0a99f66c01433fbb0fceb6a54178db,
title = "Nanometer-scaled lamellar microstructures in Ti-45Al-7.5Nb-(0; 0.5)C alloys and their influence on hardness",
abstract = "In this study, nanometer-scaled lamellar microstructures were adjusted in Ti-45Al-7.5Nb-(0; 0.5C) alloys (in at.%) and analyzed by means of transmission electron microscopy. Different annealing temperatures subsequent to quenching were used to obtain well-defined lamellar microstructures with ultrafine widths of a few tens of nanometers to a few nanometers. Surprisingly, the hardness of these alloys is enhanced by increasing the volume fraction of γ-TiAl laths. This behavior is different from the results reported in literature and can be explained by the occurrence of a size effect. The nanometer-size γ laths became harder than the α2-Ti3Al laths which are 10 times wider.",
keywords = "A. Titanium aluminides, based on TiAl, B. Solid-solution hardening, C. Heat treatment, D. Microstructure, F. Electron microscopy, transmission",
author = "Limei Cha and Christina Scheu and Helmut Clemens and Chladil, {Harald F.} and Gerhard Dehm and Rainer Gerling and Arno Bartels",
note = "Funding Information: Part of this study was supported by the EU project NOE502243-2KMN-NoE and the German Science Foundation, DFG (Projects: BA 1147/1-2, GE 1115/2-2). The HRTEM experiments were performed at the Max-Planck-Institut f{\"u}r Metallforschung, Stuttgart, Germany, and were supported by the IP3 project of the 6th Framework Programme of the European Commission: ESTEEM (Enabling Science and Technology for European Electron Microscopy) – Contract number 0260019 a. The CTEM studies were performed at the Erich-Schmid-Institute of Materials Science (Leoben, Austria). Discussions with Fritz Phillipp (Stuttgart) as well as technical supports from Rainer H{\"o}schen (Stuttgart), J{\"o}rg Thomas (Leoben) and Werner Prantl (Leoben) are kindly acknowledged.",
year = "2008",
month = jul,
doi = "10.1016/j.intermet.2008.03.009",
language = "英语",
volume = "16",
pages = "868--875",
journal = "Intermetallics",
issn = "0966-9795",
publisher = "Elsevier Ltd.",
number = "7",
}