|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||The Effect of High Speed Direct Chill Casting on Microstructure and Mechanical Properties of Al-Mg-Si-Fe Alloy
||Haitao Zhang, Dongtao Wang, Jianzhong Cui, Hiromi Nagaumi, Weizhong Fan
|On-Site Speaker (Planned)
In this paper, high-speed direct chill casting was investigated to improve the microstructure and mechanical properties of Al-Mg-Si-Fe alloy billet. With the increase of casting speed, the size of grain decreased from 82μm to 23μm; Fe-containing intermetallic phase significantly refined and transformed from bone to short rod-like shape. The macrosegregation of Mg, Si and Fe was alleviated from center to surface of the billet at high casting speed. The Mg, Si and Fe elements also had a homogeneous distribution in the grain with the increase of casting speed. Moreover, EPMA analysis indicated that solid solubility of Mg, Si and Fe improved when casting speed increased from 100mm/min to 300mm/min. Hardness, conductivity and tensile properties of Al-Mg-Si-Fe alloy all improved with the high casting speed. The high-speed direct chill casting was an effective mean to overcome the disadvantage of conventional casting process.
||Planned: Light Metals