Creep in Cast MAR ? M247 Nickel ? Base Superalloy

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Creep in Cast MAR ? M247 Nickel ? Base Superalloy
Original language description
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
Czech name
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Czech description
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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
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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