Precipitation and Growth of Intermatallic Phases in an Fe-Ni Superalloy during Prolonged Ageing

Kazimierz J. Ducki; Kinga Rodak; Lilianna Wojtynek

doi:10.4028/www.scientific.net/SSP.246.29

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Precipitation and Growth of Intermatallic Phases in an Fe-Ni Superalloy during Prolonged Ageing

Abstract:

The influence of prolonged aging on the precipitation process of intermetallic phases, as well as carbide and boride in an Fe-Ni superalloy has been studied. The samples were subjected to a solution heat treatment at 980°C for 2 h and water quenched, and then aged at 715, 750 and 780°C for 0.5-500 h. The samples were analysed using transmission electron microscopy (TEM) and X-ray diffraction. Direct measurements on the electron micrographs allowed to calculate the mean diameter () of the γ’ phase. The growth step of the γ’ phase particles has been analysed on the basis of the LSW theory, as well as the activation energy of the γ’ phase coagulation has been estimated.

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Periodical:

Solid State Phenomena (Volume 246)

Pages:

29-32

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.246.29

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Online since:

February 2016

Authors:

Kazimierz J. Ducki*, Kinga Rodak, Lilianna Wojtynek

Keywords:

A-286 Alloy, Growth, LSW Theory, Precipitation, Prolonged Ageing, γ’- Phase

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