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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 379Influence of Gama Prime Changes on the Heat...

Influence of Gama Prime Changes on the Heat Transport Phenomena of a Nickel Super Alloy

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Abstract:

The paper deals with the influence of microstructural changes of the nickel superalloy (NiS) on heat transport changes in MAR-M247. The dissolving annealing within the temperature interval of 900 – 1240°C and cooling in water has been applied to enhance structural changes. It has been shown that the narrow connection between the γ’ phase morphology changes, as well as values of density, thermal conductivity and specific heat capacity. In the dissolving annealing process, the γ’ particles change in certain cycles from fine to rough and back to fine one. Obtained results of changes of thermal conductivity, density and specific heat capacity correlate with image analysis and electron microscopy observation.

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Periodical:

Defect and Diffusion Forum (Volume 379)

Pages:

1-11

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.379.1

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Online since:

November 2017

Authors:

Pavel Koštial*, Petr Jonšta, Ivan Kopal, Zora Koštialová Jančíková, Ivo Špička, Taťána Kulová, Irena Vlčková

Keywords:

Heat Transport, Structure, Superalloy, Thermal Conductivity

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