【摘要】 研究了不同Ｙ含量对铸造Ｎｉ５０Ａｌ２０Ｆｅ３０合金组织与性能的影响。结果表明，微量Ｙ的加入可以改善Ｎｉ５０Ａｌ２０Ｆｅ３０合金的强度与塑性。Ｙ含量为０．０５ｗｔ％～０．１ｗｔ％是合金的最佳含量范围。微量Ｙ的加入影响合金的共晶区，可明显改变合金的微观组织形态。在Ｙ含量为０．１ｗｔ％时，合金主要处于β（ＮｉＡｌ）相与γ相的共晶区，这对合金的室温塑性极为有利。更多还原

【Abstract】 The effect of Y contents on microstructure and mechanical properties of a cast Ni50Al20Fe30 alloy has been investigated The results show that minor Y addion can improve the strength and the ductility of the Ni50Al20Fe30 alloy The 005wt%01 wt% Y content is optimal addtion in the alloy The minor Y can influence the eutectic zone and morphology in the alloy When doping with 01 wt% Y content, the alloy mainly constituted of fine eutictic microstructure of (NiAl) and phase This microstructure is of benefit to ductility at room temperature更多还原