Effect of heat treatment parameters on microstructural evolution and properties of semi-solid extruded Al-Fe alloy
In this study, heat treatments of T1 and T6 have been applied to Al-Fe alloy after thixoforming to investigate the effects of heat treatment parameters on the microstructures and mechanical properties, and OM (Optical microscope), SEM (scanning electron microscope) and other methods were used. The results indicate that after semi-solid extrusion, the grain sizes are much smaller than those after electromagnetic stirring, but distribute heterogeneously on the matrix; the AI3Fe phase is surrounded by Cu elements, and becomes a slight halo. After T6 heat treatment, more Cu elements accumulate around AI3Fe, which become a visible halo. In addition, grains are coarsening and irregular-shaped, so the mechanical properties of alloy decrease. While after T1 heat treatment, grain size decreases and distributes more homogenously within the matrix. The mechanical properties of the alloy are improved by the precipitates of AI2Cu phases.
Al-Fe alloy semi-solid extrusion heat treatment grain growth
Li Runxia Luan Xinying Cao Yang Li Qing Zhang Jia Yuan Xiao-guang Li Rongde
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Chi Shenyang Research Institute of Foundry, Shenyang 110022, China
国际会议
The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)
广州
英文
1-4
2011-11-12（万方平台首次上网日期，不代表论文的发表时间）