Creep in Cast MAR ? M247 Nickel ? Base Superalloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450437" target="_blank" >RIV/68081723:_____/15:00450437 - 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

Creep in Cast MAR ? M247 Nickel ? Base Superalloy

Popis výsledku v původním jazyce

The MAR ? M247 superalloy exhibits a variety of excellent characteristics, including good castability, good strength levels, superior creep properties, and hot corrosion resistance at high temperatures. The material underwent hot isostatic pressing (HIP)and proper heat treatment. The microstructure was dendritic with coarse grain size of about 0.8 mm and the high volume fraction of strengthening phase (around 60%) heterogeneously distributed in the matrix. Standard uniaxial tensile creep tests were carried out to the rupture. The creep tests were performed at applied stresses ranging from 100 to 750 MPa and at temperatures from 800 to 1000°C. The determined values of stress exponent n correspond to the power-law creep regime and suggest dislocation glide a climb as a dominating creep deformation mechanisms. Fractographic observations by SEM indicated that at lower test temperature is the fracture of MAR-M247 superalloy of intergranular fracture mode. With increasing test temperature a

Název v anglickém jazyce

Creep in Cast MAR ? M247 Nickel ? Base Superalloy

Popis výsledku anglicky

The MAR ? M247 superalloy exhibits a variety of excellent characteristics, including good castability, good strength levels, superior creep properties, and hot corrosion resistance at high temperatures. The material underwent hot isostatic pressing (HIP)and proper heat treatment. The microstructure was dendritic with coarse grain size of about 0.8 mm and the high volume fraction of strengthening phase (around 60%) heterogeneously distributed in the matrix. Standard uniaxial tensile creep tests were carried out to the rupture. The creep tests were performed at applied stresses ranging from 100 to 750 MPa and at temperatures from 800 to 1000°C. The determined values of stress exponent n correspond to the power-law creep regime and suggest dislocation glide a climb as a dominating creep deformation mechanisms. Fractographic observations by SEM indicated that at lower test temperature is the fracture of MAR-M247 superalloy of intergranular fracture mode. With increasing test temperature a

Druh

O - Ostatní výsledky

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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