STUDY OF TCP PHASE PRECIPITATING IN GH4199 SUPERALLOY
STUDY OF TCP PHASE PRECIPITATING IN GH4199 SUPERALLOY作者机构:SchoolofMaterialsandMetallurgyNortheasternUniversityShenyang110004ChinaManuscriptreceived15July2003 inrevisedform19January2004
出 版 物:《Acta Metallurgica Sinica(English Letters)》 (金属学报(英文版))
年 卷 期:2004年第17卷第5期
页 面:645-650页
核心收录:
学科分类:0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程(可授工学、理学学位)] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程]
主 题:superalloy TCP phase electron hole number
摘 要: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.