摘要
采用Ｘ射线衍射技术测定了冷轧Ｉｎｃｏｎｅｌ ７１８合金在８１０℃时效温度下γ＂相和δ相的含量，研究了冷轧变形对γ＂相析出和γ＂→δ、转变的影响结果表明，在８１０℃时效，γ＂相的析出达到饱和状态此时γ＂→δ的转变即将发生；应变可诱发γ相析出以及γ＂→δ转变；δ相的数量与时间的关系符合Ａｖｒａｍｉ方程。随冷轧变形量增加，时间指数减小。
The mass fractions of γ＂ and δ phases in Inconel 718 cold rolled to different reductions and then aged at 810℃ for different times were measured by X-ray diffraction technique. The effects of cold rolling on the precipitation of γ＂ phase and theγ＂ →δ transformation were investigated. At 810 ℃ aging, the γ＂ precipitation has reached the saturation level just before the γ→δ transformation occurs. Strain induces both the precipitation of γ phase and the γ→ δ transformation. The relationship between the amount of δ phase and aging time follows the Avrami equation. As cold rolling reduction increases, the time exponent (n1) decreases, while the rate of the δ precipitation increases. The amount of the γ＂ → δ transformation can also be described by the Avrami equation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期150-154,共5页
Acta Metallurgica Sinica
基金
中国航空工业总公司重点攻关项目!FWS1006
国家自然科学基金!59971039
