DETERMINATION OF INTERMETALLIC COMPOUNDS AND SOLID SOLUTION IN ALUMINUM ALLOYS USING ICP-AES AFTER CHEMICAL ISOLATION WITH PHENOL

摘要

After dissolving aluminum alloys in phenol, we separated insoluble intermetallic compounds from the matrix by filtration. The contents of the intermetallic compounds and the solid solutions were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The total values of the intermetallic compounds and the solid solutions were almost equal to those of the bulk in case of Al-Mn, Al-Mg and Al-Mg-Si alloys. The amounts of solid solutions of silicon increased linearly with the tensile strength in the case of Al-Mn alloys. We found a correlation between amounts of iron of intermetallic compound and mechanical properties in the case of Al-Mg alloys. On the whole, a decrease in amounts of iron in intermetallic compounds tends to decrease both tensile and yield strengths. In the case of Al-Mg-Si samples, the results of analysis showed the form of additives varied with the heat treatment.