Effect of different investment casting conditions on high cycle fatigue of MAR-M 247 superalloy at elevated temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU116067" target="_blank" >RIV/00216305:26210/15:PU116067 - 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

Effect of different investment casting conditions on high cycle fatigue of MAR-M 247 superalloy at elevated temperatures

Popis výsledku v původním jazyce

Cast polycrystalline superalloy MAR-M 247 has been thoroughly studied under high cycle fatigue loading. Investigated alloy was available in several batches cast under different conditions and also into different types of molds. Fully reversed (R = -1) fatigue testing was conducted by resonant pulsator in stress control regime at temperatures 650 and 800 °C. Significant differences in fatigue life time were observed among various batches. Obtained fatigue test results are showing the effect of the distribution and size of defects, average grain size and also experimental temperature. Fractured surface of tested specimens underwent fractographic analysis by light and electron microscopy. Typical features of fracture surfaces for the experimental temperatures were closely studied and main deformation mechanisms were described. In most cases, the shrinkage pores were places of the fatigue crack initiation at both temperatures. Advanced electron microscopy techniques like electron back-scat

Název v anglickém jazyce

Effect of different investment casting conditions on high cycle fatigue of MAR-M 247 superalloy at elevated temperatures

Popis výsledku anglicky

Cast polycrystalline superalloy MAR-M 247 has been thoroughly studied under high cycle fatigue loading. Investigated alloy was available in several batches cast under different conditions and also into different types of molds. Fully reversed (R = -1) fatigue testing was conducted by resonant pulsator in stress control regime at temperatures 650 and 800 °C. Significant differences in fatigue life time were observed among various batches. Obtained fatigue test results are showing the effect of the distribution and size of defects, average grain size and also experimental temperature. Fractured surface of tested specimens underwent fractographic analysis by light and electron microscopy. Typical features of fracture surfaces for the experimental temperatures were closely studied and main deformation mechanisms were described. In most cases, the shrinkage pores were places of the fatigue crack initiation at both temperatures. Advanced electron microscopy techniques like electron back-scat

Druh

O - Ostatní výsledky

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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