| 1 | STUDY OF TCP PHASE PRECIPITATING IN GH4199 SUPERALLOY显示文摘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. | T.Cui Y.S.Zhang S.W.Guo L.Wang H.C.Yang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，5： | 3 |
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