The formation of Al6 (Fe, Mn) phase in die-cast Al-Mg alloys

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Zhu, Xiangzhen^1 ; Ji, Shouxun^1

Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge, Middlesex

UB8 3PH, United Kingdom^1

关键词: 3D morphology;    Al-Mg-Mn alloys;    Fe additions;    Fe-Rich intermetallics;    Intermetallic phasis;    Solidification behaviour;    Stress raisers;    Vital effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012011/pdf
DOI  :  10.1088/1757-899X/529/1/012011

来源: IOP

【 摘 要 】

In aluminium alloys, iron is a common impurity as it is unavoidably picked up in practice. The excessive Fe is strongly prone to form various intermetallic phases. These Fe-rich intermetallics are generally brittle and act as stress raisers to weaken the coherence with Al matrix, therefore decreasing elongation. However, Fe addition in Al-Mg alloys may be beneficial because of the improvement in the yield strength with the scarification of ductility of die-cast aluminium alloys. The morphology of intermetallic phases has a vital effect on the properties of aluminium alloys. In the present work, the 3D morphology of Al6 (Fe, Mn) in die-cast Al-Mg-Mn alloys with different levels of Fe contents were revealed. The formation of Al6 (Fe, Mn) was also studied through crystal features and solidification behaviours.