Analysis of the Effective and Internal Cyclic Stress Components in the Superalloys Fatigued at Elevated Temperature

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F11%3APU92943" target="_blank" >RIV/00216305:26210/11:PU92943 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of the Effective and Internal Cyclic Stress Components in the Superalloys Fatigued at Elevated Temperature

Popis výsledku v původním jazyce

Cyclic multiple step test in strain control have been performed on cylindrical specimens of cast polycrystalline Inconel 738LC and 792-5A superalloys at 800 C in laboratory atmosphere. Hysteresis loops were analyzed according to the statistical theory ofhysteresis loop. The effective and internal stress components were evaluated. The effective stress of gamma prime precipitate has significant influence on the stress-strain response both materials. The stress amplitude in IN 792-5A is higher than in IN738LC at approximately same total strain amplitude due to significantly higher effective stress of gamma prime phase. Cyclic hardening/softening curves and cyclic stress-strain curves using short-cut procedure were obtained. Cyclic hardening/softening behavior depends both on temperature and strain amplitude. Low amplitude straining is characterized by the saturation of the stress amplitude. In high amplitude straining slight softening was found. The cyclic stress-strain curves for both

Název v anglickém jazyce

Analysis of the Effective and Internal Cyclic Stress Components in the Superalloys Fatigued at Elevated Temperature

Popis výsledku anglicky

Cyclic multiple step test in strain control have been performed on cylindrical specimens of cast polycrystalline Inconel 738LC and 792-5A superalloys at 800 C in laboratory atmosphere. Hysteresis loops were analyzed according to the statistical theory ofhysteresis loop. The effective and internal stress components were evaluated. The effective stress of gamma prime precipitate has significant influence on the stress-strain response both materials. The stress amplitude in IN 792-5A is higher than in IN738LC at approximately same total strain amplitude due to significantly higher effective stress of gamma prime phase. Cyclic hardening/softening curves and cyclic stress-strain curves using short-cut procedure were obtained. Cyclic hardening/softening behavior depends both on temperature and strain amplitude. Low amplitude straining is characterized by the saturation of the stress amplitude. In high amplitude straining slight softening was found. The cyclic stress-strain curves for both

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Materials Research

ISSN

1022-6680

e-ISSN

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Svazek periodika

278

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

393-398

Kód UT WoS článku

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EID výsledku v databázi Scopus

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