Cyclic plastic response of nickel-based superalloys at room and at elevated temperatures

0399434 - ÚFM 2014 RIV DE eng C - Konferenční příspěvek (zahraniční konf.)
Polák, Jaroslav - Petrenec, Martin - Chlupová, Alice - Tobiáš, Jiří - Petráš, Roman
Cyclic plastic response of nickel-based superalloys at room and at elevated temperatures.
Proceedings of the Seventh International Conference on Low Cycle Fatigue - LCF7. Berlín: DMV, 2013, s. 107-112. ISBN 978-3-9814516-2-7.
[LCF7 - International Conference on Low Cycle Fatigue /7./. Aachen (DE), 09.09.2013-11.09.2013]
Grant CEP: GA ČR(CZ) GAP204/11/1453
Institucionální podpora: RVO:68081723
Klíčová slova: superalloys * elevated temperature * hysteresis loop
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

Nickel-based IN 738LC superalloy has been cycled at increasing strain amplitudes at room temperature and at 800 °C. Hysteresis loops were analyzed using statistical theory of the hysteresis loop and dislocation structure of specimens cycled at these two temperatures were studied. The analysis of the loop shapes yields effective stresses of the matrix and of the precipitates and the probability density function of the critical internal stresses at both temperatures. It allows disclosing the sources of the high cyclic stress.
Trvalý link: http://hdl.handle.net/11104/0226742