STUDY OF TCP PHASE PRECIPITATING IN GH4199 SUPERALLOY
来源期刊：Acta Metallurgica Sinica2004年第5期
论文作者：Y.S.Zhang S.W.Guo H.C.Yang T.Cui L.Wang
Key words：superalloy; TCP phase; electron hole number;
Abstract: The precipitating regulation and mechanism of TCP phase (μ phase and σ phase) are studied, using electron hole number (EHN) theory, phase analysis technology and TEM observation. The results indicate that the EHN in studied alloy is 2.311-2.348 which is higher than that of critical EHN of μ phase precipitate (2.30), so μ phase could precipitate if there is enough thermo-exposition. In contrast, the calculated EHN is less than that of critical EHN of σ phase precipitate (2.52). However the σ phase is also observed by TEM.Enrich of Cr and Mo around γ phase after γ' phase precipitated leads to σ phase precipitated.
Y.S.Zhang1，S.W.Guo1，H.C.Yang1，T.Cui1，L.Wang1
(1.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The precipitating regulation and mechanism of TCP phase (μ phase and σ phase) are studied, using electron hole number (EHN) theory, phase analysis technology and TEM observation. The results indicate that the EHN in studied alloy is 2.311-2.348 which is higher than that of critical EHN of μ phase precipitate (2.30), so μ phase could precipitate if there is enough thermo-exposition. In contrast, the calculated EHN is less than that of critical EHN of σ phase precipitate (2.52). However the σ phase is also observed by TEM.Enrich of Cr and Mo around γ phase after γ'' phase precipitated leads to σ phase precipitated.
Key words:superalloy; TCP phase; electron hole number;
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