材料科学
铝
合金
冶金
延伸率
沉积(地质)
极限抗拉强度
多孔性
弧(几何)
复合材料
机械工程
工程类
古生物学
沉积物
生物
作者
Yunfei Meng,Zeyu Li,Ming Gao,Hui Chen,Xu Wu,Qianxi Yu
标识
DOI:10.1016/j.tws.2024.111622
摘要
Due to the interference of ambient wind on arc burning and droplet transfer, wire arc additive manufacturing (WAAM) of aluminum alloy in field environment is hindered. The gas-slag joint protection by synchronous feeding of AlSi5 wire and mixed powder of 90Mg-5TiO2-5NaF (wt.%) was introduced. It was found the wind resistance for the stable deposition of thin-wall could be improved from 1.5 to 3.5 m/s. The added Mg benefited to refine the grain size by 21% and promote the formation of Mg2Si, which improved the mechanical properties by induced solid solution-precipitation strengthening effects. Furthermore, with the assistance of laser cleaning, the porosity of thin-wall deposited at ambient wind speed of 3.5 m/s was reduced from 54.9% to 28%. These improvements increased the ultimate tensile strength and elongation to 166 MPa and 3.7%, reaching 98.2% and 31% of the WAAM at indoor windless environment respectively.
科研通智能强力驱动
Strongly Powered by AbleSci AI