【作者】 赵锴； 楼琅洪； 文怡； 姜卫国； 胡壮麒；

【Author】 Zhao Kai Lou Langhong Wen Yi Jiang Weiguo Hu Zhuangqi (Institute of Metal Research,CAS,Liaoning Shenyang 110016,China)

【机构】 中国科学院金属研究所；

【摘要】 铸态样品经过900℃×500h 直接时效后,在枝晶间析出了具有特定取向关系的片状μ相,研究表明：这些μ相不是由γ基体析出,而是由粗化后的γ′相中析出,位相关系为{111_}γ′,∥{0001}_μ和〈110〉_γ′∥〈1120〉_μ。μ相的不均匀分布导致了相变应力的产生,形成了筏化结构。大量μ相的析出恶化了合金的室温塑性。更多还原

【Abstract】 μ phase distributed at interdendritic area in the as-cast specimens after direct aging at 900℃ for 500 hours and pre- cipitated mainly from γ′ phase instead of γ matrix in this experimental alloy,leading to definite orientation relationship as {111}_γ′//{0001}_μ and〈110〉_γ′//〈1120〉_μ,.It was also found that directional coarsening was induced by phase transfor- mation stress due to non uniform distribution of μ phase.The room temperature ductility was deteriorated by the precipitation of μ phase.更多还原