Effect of melt superheat on microstructure of Al4Fe2Mn1.5 Monel alloy

来源期刊：中国有色金属学报(英文版)2009年第1期

论文作者：王富 邹军涛 王献辉 范志康

文章页码：19 - 25

Key words：Al4Fe2Mn1.5 Monel alloy; melt superheat; microstructure

Abstract: The effect of melt superheat on microstructure of Al4Fe2Mn1.5 Monel alloy made by vacuum melting method was studied. The results show that the alloy consists of dendritic γ matrix and γ′ phase, wherein γ′ phase has two morphologies at different melt superheat. One is divorced eutectic γ′ which distributes in the interdendritic area, the other distributes dispersedly in single particle on the dendritic arm and exists in the petalform shape in the transition area between dendritic arm and interdendritic area. With the increase of superheat, the dendrite becomes finer, the primary dendritic arm is melted off and the secondary dendritic arm spacing decreases. The size of γ′ phase distributed on the dendritic arm becomes smaller and the divorced eutectic γ′ phase increases.