Publication detail
Crack resistance characterization in TiAl intermetallics with enhanced toughness
DLOUHÝ, I. STRATIL, L. FUKUTOMI, H. HASEGAWA, M.
English title
Crack resistance characterization in TiAl intermetallics with enhanced toughness
Type
journal article in Scopus
Language
en
Original abstract
The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable α phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of α+γ phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load – unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. © 2017 Trans Tech Publications, Switzerland.
English abstract
The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable α phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of α+γ phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load – unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. © 2017 Trans Tech Publications, Switzerland.
Keywords in English
titanium aluminides, intermetallics, hot working
Released
04.11.2016
Publisher
Elsevier
ISSN
1013-9826
Volume
741
Number
11
Pages from–to
13–18
Pages count
6
BIBTEX
@article{BUT170691,
author="Ivo {Dlouhý} and Luděk {Stratil} and Hiroshi {Fukutomi} and Makoto {Hasegawa},
title="Crack resistance characterization in TiAl intermetallics with enhanced toughness",
year="2016",
volume="741",
number="11",
month="November",
pages="13--18",
publisher="Elsevier",
issn="1013-9826"
}