Microstructure degradation in high temperature fatigue of TiAl

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00428526" target="_blank" >RIV/68081723:_____/14:00428526 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijfatigue.2013.10.005" target="_blank" >http://dx.doi.org/10.1016/j.ijfatigue.2013.10.005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijfatigue.2013.10.005" target="_blank" >10.1016/j.ijfatigue.2013.10.005</a>

Result language
angličtina
Original language name
Microstructure degradation in high temperature fatigue of TiAl
Original language description
Low cycle fatigue properties of lamellar TiAl with 8 at.% Nb were studied at four temperatures: room temperature, 700, 750 and 800 °C. Up to 750 °C, stable cyclic behaviour is observed while cyclic softening is characteristic for 800°C. The strength of the alloy is still high even at 800 °C. The TEM observation did not reveal any substantial changes in the microstructure due to the cycling at RT. At 750 °C, the lamellar structure was in some places destroyed by cyclic plastic straining and pure -phase islands with high density of dislocation debris were formed. At 800 °C, the domains without lamellar structure cover about 10% of volume and are almost dislocation free. The destruction of lamellar microstructure and possible annealing of dislocation debris is the reason for marked cyclic softening at 800 °C.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Project
<a href="/en/project/GAP107%2F11%2F0704" target="_blank" >GAP107/11/0704: Optimization of structure and properties of advanced high-temperature cast materials alloyed with carbon by complex heat treatment</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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