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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Effect of different investment casting conditions on high cycle fatigue of MAR-M 247 superalloy at elevated temperatures
Original language description
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
Czech name
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Czech description
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Project
<a href="/en/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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