Comparative study of microstructure and high temperature low cycle fatigue behaviour of nickel base superalloys Inconel 713LC and MAR-M247

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00462761" target="_blank" >RIV/68081723:_____/16:00462761 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.713.86" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.713.86</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.713.86" target="_blank" >10.4028/www.scientific.net/KEM.713.86</a>

Result language

angličtina

Original language name

Comparative study of microstructure and high temperature low cycle fatigue behaviour of nickel base superalloys Inconel 713LC and MAR-M247

Original language description

The present work is focused on the study of microstructure and low cycle fatigue behavior of the first generation nickel-base superalloy IN 713LC (low carbon) and its promising second generation successor MAR-M247 HIP (hot isostatic pressing) at 900 °C. Microstructure of both alloys was studied by means of scanning electron microscopy (SEM). The microstructure of both materials is characterized by dendritic grains, carbides and casting defects. Size and morphology of precipitates and casting defects were evaluated. Fractographic observations have been made with the aim to reveal the fatigue crack initiation place and relation to the casting defects and material microstructure. Low cycle fatigue tests were conducted on cylindrical specimens in symmetrical push-pull cycle under strain control with constant total strain amplitude and strain rate at 900 °C in air. Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained. Cyclic stress-strain curve of MAR M247 is shifted approximately to 120 MPa higher stress amplitudes in comparison with IN 713LC. Significantly higher fatigue life of MAR-M247 has been observed in Basquin representation. On the other hand IN 713LC shows prolonged lifetime compared with MAR-M247 in the Coffin-Manson representation. Results obtained from high temperature low cycle fatigue tests are discussed.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Article name in the collection

Advances in Fracture and Damage Mechanics XV

ISBN

978-3-03835-716-2

ISSN

1013-9826

e-ISSN

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Number of pages

4

Pages from-to

86-89

Publisher name

Trans Tech Publications Ltd

Place of publication

Pfaffikon

Event location

Alicante

Event date

Sep 14, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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