Role of defects in fatigue damage mechanisms of cast polycrystalline superalloy MAR-M 247

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434596" target="_blank" >RIV/68081723:_____/14:00434596 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/matecconf/20141203005" target="_blank" >http://dx.doi.org/10.1051/matecconf/20141203005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/matecconf/20141203005" target="_blank" >10.1051/matecconf/20141203005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Role of defects in fatigue damage mechanisms of cast polycrystalline superalloy MAR-M 247

Popis výsledku v původním jazyce

High-cycle fatigue life of nickel-based superalloy MAR-M 247 was experimentally determined for as-cast material and material processed by hot isostatic pressing (HIP). Fatigue testing was conducted at temperatures 650, 800, 900 C in laboratory air. HIP was done at the following conditions: 1200 C/100 MPa/240 min. It has been found that HIP significantly improves the fatigue life. Obtained results indicate that main factors which determine the fatigue strength of material in both conditions are grain size, grain orientation and size and distribution of casting defects. The distribution and size of the casting defects were evaluated by light microscopy on metallographic sections. The data were processed by the extreme value statistics, which enables to estimate the maximum size of a defect likely to occur in a defined volume. Light and scanning electron microscopy were used for fractographic investigation of fracture surfaces and fatigue crack initiation sites. Focused ion beam technique

Název v anglickém jazyce

Role of defects in fatigue damage mechanisms of cast polycrystalline superalloy MAR-M 247

Popis výsledku anglicky

High-cycle fatigue life of nickel-based superalloy MAR-M 247 was experimentally determined for as-cast material and material processed by hot isostatic pressing (HIP). Fatigue testing was conducted at temperatures 650, 800, 900 C in laboratory air. HIP was done at the following conditions: 1200 C/100 MPa/240 min. It has been found that HIP significantly improves the fatigue life. Obtained results indicate that main factors which determine the fatigue strength of material in both conditions are grain size, grain orientation and size and distribution of casting defects. The distribution and size of the casting defects were evaluated by light microscopy on metallographic sections. The data were processed by the extreme value statistics, which enables to estimate the maximum size of a defect likely to occur in a defined volume. Light and scanning electron microscopy were used for fractographic investigation of fracture surfaces and fatigue crack initiation sites. Focused ion beam technique

Druh

D - Stať ve sborníku

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/FR-TI4%2F030" target="_blank" >FR-TI4/030: Výzkum a vývoj mechanických vlastností nových typů odlitků ze superslitin na bázi niklu, vyvinutých technologiemi přesného lití pomocí metody vytavitelného modelu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Fatigue Design and Material Defects, FDMD II - JIP2014

ISBN

978-2-7598-1274-5

ISSN

2261-236X

e-ISSN

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Počet stran výsledku

3

Strana od-do

"Art. n. 03005"

Název nakladatele

EDP Sciences

Místo vydání

Paris

Místo konání akce

Paris

Datum konání akce

11. 6. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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