Influence of Pulsed Magnetic Field Solution Treatment on Microstructure and Properties of La-Ce Modified ZL114A Aluminum Alloy AITranslate

Basic Information:

DOI：

Chinese Library Classification Number:TG146.21[一般工业技术—材料科学与工程];TG156.94[金属学及工艺—金属材料]

Citation Information:

To address the issues of coarse microstructure and low efficiency of conventional solution treat-ment in ZL114A aluminum alloy,modification treatment of the alloy was carried out by adding 0.25%(mass fraction)La-Ce mixed rare earth.Plused magnetic field solution treatment was performed at 530℃for 6 h,8 h,and 10 h using a self-developed pulsed magnetic field heat treatment apparatus,with the 10 h conventional solution treatment as a control group.The effects of pulsed magnetic field solution treatment on the microstructure and properties of the alloy were systematically investigated.The results show that the microstructure and hardness of La-Ce modified ZL114A aluminum alloy after pulsed magnetic field so-lution treatment are superior to those of conventional solution treatment for 10 h.Among them,the 8 h pulsed magnetic field solution treatment exhibits the optimal effect.Compared with the 10 h conventional solution treatment,it reduces the aspect ratio of eutectic silicon by 24.3%,decreases the average size by 32.7%,increases the hardness by 17%,and results in a more homogeneous distribution of rare earth ele-ments.Mechanism analysis shows that the pulsed magnetic field provides an extra diffusion driving force for solute atoms via the current path distortion effect,effectively reducing the diffusion activation energy,thereby accelerating the cracking and spheroidization of eutectic silicon and promoting the dispersed distri-bution of rare earth elements.The pulse magnetic field solution treatment process can shorten the conven-tional solution treatment time by at least 2 h while ensuring or even improving solution quality,thereby significantly enhancing production efficiency.This study provides theoretical and technological references for the efficient production and quality improvement of rare earth-modified ZL114A aluminum alloy.