The effect of chromium on the solubility limits of the γ′-forming elements in a NiFeCr base superalloy

NIMONIC PE16 alloy was studied to determine the effects of Cr on the solubility of gamma '- forming elements and suppression of gamma '- precipitation. Chromium was added to two sample melts to test Cr contents of 17 at% (NIMONIC PE16), 23 at%, and 29 at%. After suitable heat treatments to...

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Bibliographic Details
Published in:Scripta metallurgica et materialia 1994-11, Vol.31 (9), p.1239-1242
Main Authors: Kalogeridis, Avraam, Kolbe, Matthias, Nembach, Eckhard
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Metals. Metallurgy
Physics
Solubility, segregation, and mixing
phase separation
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Summary:NIMONIC PE16 alloy was studied to determine the effects of Cr on the solubility of gamma '- forming elements and suppression of gamma '- precipitation. Chromium was added to two sample melts to test Cr contents of 17 at% (NIMONIC PE16), 23 at%, and 29 at%. After suitable heat treatments to ensure the formation of gamma '- precipitates, samples were examined by TEM. The data show that increasing the Cr content lowers the volume fraction of gamma ' phase, thus indicating an increased solubility of gamma '- forming elements, and lowers the growth rate of gamma '- precipitates.
ISSN:0956-716X
DOI:10.1016/0956-716X(94)90583-5