Florián-Algarín David, Marrero Raúl, Li Xiaochun, Choi Hongseok, Suárez Oscar Marcelo
Department of Civil Engineering, University of Puerto Rico-Mayagüez, Mayagüez, PR 00681, USA.
Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA.
Materials (Basel). 2018 Mar 10;11(3):413. doi: 10.3390/ma11030413.
This study sought to characterize aluminum nanocomposite wires that were fabricated through a cold-rolling process, having potential applications in TIG (tungsten inert gas) welding of aluminum. A206 (Al-4.5Cu-0.25Mg) master nanocomposites with 5 wt % γAl₂O₃ nanoparticles were first manufactured through a hybrid process combining semi-solid mixing and ultrasonic processing. A206/1 wt % γAl₂O₃ nanocomposites were fabricated by diluting the prepared master nanocomposites with a monolithic A206 alloy, which was then added to a pure aluminum melt. The fabricated Al-γAl₂O₃ nanocomposite billet was cold-rolled to produce an Al nanocomposite wire with a 1 mm diameter and a transverse area reduction of 96%. Containing different levels of nanocomposites, the fabricated samples were mechanically and electrically characterized. The results demonstrate a significantly higher strength of the aluminum wires with the nanocomposite addition. Further, the addition of alumina nanoparticles affected the wires' electrical conductivity compared with that of pure aluminum and aluminum-copper alloys. The overall properties of the new material demonstrate that these wires could be an appealing alternative for fillers intended for aluminum welding.
本研究旨在对通过冷轧工艺制造的铝纳米复合丝进行表征，这种复合丝在铝的钨极惰性气体保护焊（TIG）中具有潜在应用。首先通过半固态混合和超声处理相结合的混合工艺制备了含有5 wt%γAl₂O₃纳米颗粒的A206（Al-4.5Cu-0.25Mg）母纳米复合材料。通过用整体A206合金稀释制备好的母纳米复合材料来制备A206/1 wt%γAl₂O₃纳米复合材料，然后将其添加到纯铝熔体中。将制备好的Al-γAl₂O₃纳米复合坯料进行冷轧，以生产直径为1 mm、横向截面积减少96%的铝纳米复合丝。对含有不同含量纳米复合材料的制备样品进行了力学和电学表征。结果表明，添加纳米复合材料后铝丝的强度显著提高。此外，与纯铝和铝铜合金相比，氧化铝纳米颗粒的添加影响了铝丝的电导率。新材料的整体性能表明，这些铝丝可能是铝焊接填充材料的一个有吸引力的替代品。
