Precipitated phases and thermodynamic analysis during solidification of Al-Fe-X system at slow cooling rate
来源期刊：中国有色金属学报(英文版)2003年第5期
论文作者：谭敦强 黎文献 肖于德 王冲
文章页码：1133 - 1136
Key words：solidification curve; thermodynamic analysis; heat-resistant Al alloy
Abstract: The solidification curves of Al-8.5Fe, Al-8.5Fe-1.7Fe, Al-8.5Fe-1.7Si-1.3V alloys were examined by DTA under the condition of slow cooling rate, the phase constitutes were examined by OM and XRD. The results show that, under slow cooling rate, the phases in Al-8.5Fe alloy are mainly α(Al) and Al13Fe4, the phases in Al-8.5Fe-1.7Si alloy are mostly α(Al), Al13Fe4, α-AlFeSi, β-AlFeSi, and comparing to Al-8.5Fe-1.7Si alloy, no other phases form in the Al-8.5Fe-1.3V-1.7Si alloy, but the chemical compositions of the phases are changed and the thermal stability of α-AlFeSi phase and β-AlFeSi phase is improved, due to the partial substitution of V for Fe atoms. The phase formation was calculated by Thermo-calc software at equilibrium condition, the calculated results were agreement with the experimental results.
