Publication detail
Effect of elevated temperatures on the shape of hysteresis loop of nickel based superalloy
PETRENEC, M. ŠMÍD, M. POLÁK, J. OBRTLÍK, K.
Czech title
Efekt zvýšených teplot na tvar hysterezní smyčky niklové superslitiny
English title
Effect of elevated temperatures on the shape of hysteresis loop of nickel based superalloy
Type
conference paper
Language
en
Original abstract
The hysteresis loops of cast Inconel 738LC superalloy obtained from multiple step tests at 23 and 800 C were analyzed using a generalised statistical theory of the hysteresis loop. The plot of the second derivative yields information on the average effective stress and the probability density function of the critical internal stresses. The probability density function in superalloy has two peaks, at both temperatures, which correspond to the two-phase structure. Cyclic hardening/softening curves and cyclic stress-strain curves were obtained at both temperatures.
Czech abstract
Hysterezní smyčky lité superslitiny Inconel 738LC získané z únavové zkoušky se stupňující amplitudou deformace při 23 a 800 C byly analyzovány použitím zobecněné statistické teorie hysterezní smyčky. Grafy druhých derivací hysterezních půl-smyček nesou informace o průměrných efektivních napětích a funkci hustoty pravděpodobnosti interních napětí. Tato funkce měla dva vrcholy, u obou teplot, které odpovídají dvoufázové struktuře. Byly naměřeny křivky cyklického zpevnění/změkčení a cyklické deformační křivky pro obě teploty.
English abstract
The hysteresis loops of cast Inconel 738LC superalloy obtained from multiple step tests at 23 and 800 C were analyzed using a generalised statistical theory of the hysteresis loop. The plot of the second derivative yields information on the average effective stress and the probability density function of the critical internal stresses. The probability density function in superalloy has two peaks, at both temperatures, which correspond to the two-phase structure. Cyclic hardening/softening curves and cyclic stress-strain curves were obtained at both temperatures.
Keywords in Czech
Hysterezní smyčka, efektivní a interní napětí; superslitiny
Keywords in English
Hysteresis loop; effective and internal stresses; superalloy
RIV year
2008
Released
17.06.2008
Publisher
St. Petersburg State Polytechnic University
Location
St. Petersburg
ISBN
978-5-7422-1856-2
Book
Assessment of reliability of materials and structures: Problems and solutions
Pages from–to
278–282
Pages count
5
BIBTEX
@inproceedings{BUT35196,
author="Martin {Petrenec} and Miroslav {Šmíd} and Jaroslav {Polák} and Karel {Obrtlík},
title="Effect of elevated temperatures on the shape of hysteresis loop of nickel based superalloy",
booktitle="Assessment of reliability of materials and structures: Problems and solutions",
year="2008",
month="June",
pages="278--282",
publisher="St. Petersburg State Polytechnic University",
address="St. Petersburg",
isbn="978-5-7422-1856-2"
}