Fatigue life and fracture of cast gamma TiAl intermetallic alloy at room and elevated temperatures

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F11%3A00439947" target="_blank" >RIV/68081723:_____/11:00439947 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Fatigue life and fracture of cast gamma TiAl intermetallic alloy at room and elevated temperatures
Original language description
The low-cycle fatigue properties, surface relief and fracture surfaces of cast TiAl alloys with 2 at.% Nb having nearly lamellar microstructure were studied at room temperature and at 750 degrees C. Cyclic stress-strain curves (CSSC) and fatigue life curves were obtained at both temperatures. The surface relief and the fracture surfaces of fractured specimens were observed using scanning electron microscopy. At room temperature, significant cyclic hardening is observed whereas at 750 degrees C cyclic response was stable. Parameters of the CSSC, the Manson-Coffin law and the Basquin law were determined. Persistent slip markings formed along interlamellar interfaces were predominant locations for fatigue cracks at both temperatures. The cracks initiatedat surface or in sub-surface region led to the formation of smooth flat areas on the fracture surface corresponding to the persistent slip bands.
Czech name
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Czech description
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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
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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