The melt of V-modified A380 alloy aluminum alloy was treated by compound field of ultrasonic vibration (UV) and electromagnetic stirring (ES) around liquidus temperatures. Then the high pressure rheo-squeeze casting (HPRSC) process was used to produce an ingot with the alloy melt obtained. The results indicate that the polygonal Si₂V phase is precipitated after adding vanadium to the alloy. With the increasing of V content from 0 to 1.05%, the average length and volume fraction of β-Al₅FeSi phase is decreased to 30 μm and 1.44%, respectively. The refinement effects of UV, ES, and UV-ES compound field on the microstructure of the gravity casting alloy are as follows: UV-ES > UV > ES. When the pressure is increased from 0 to 400 MPa, the size of primary α-Al is decreased gradually, the morphology of β-Al₅FeSi phase is changed from an acicular to a fine fibrous-like one, and the polygonal Si₂V phase is refined to fine particle with an average grain diameter of about 8 μm. The ultimate tensile strength (UTS), yield strength (YS), and elongation of the alloy without V are lower than that of the alloy with 0.7%V under the same pressure. When the pressure is 400 MPa, the UTS, YS, and elongation of T6 heat-treated HPRSC alloy with 0.7%V are 301 MPa, 182 MPa, and 3.3%, respectively. With the decrease in the length of β-Al₅FeSi phase, the quality index of the HPRSC alloy is increased.

中文翻译：

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复合流场处理高压流变挤压铸造V-变质A380铝合金的组织与性能

在液相线温度附近，通过超声振动（UV）和电磁搅拌（ES）的复合场对V改性A380铝合金的熔体进行了处理。然后，采用高压流变挤压铸造（HPRSC）工艺生产具有所获得合金熔体的铸锭。结果表明，向合金中添加钒后，多边形Si ₂ V相析出。随着V内容的从0到1.05％，平均长度和体积分数β-Al系的增加₅FeSi相分别减小至30μm和1.44％。UV，ES和UV-ES复合场对重力铸造合金显微组织的细化效果如下：UV-ES> UV> ES。当压力从0提高至400兆帕，而逐渐减小初级α-Al的大小，β-Al系的形态₅硅铁相从针状变为微细纤维状状之一，并且所述多边形的Si ₂将V相细化为平均粒径约为8μm的细颗粒。在相同压力下，不含V的合金的极限拉伸强度（UTS），屈服强度（YS）和伸长率均低于含0.7％V的合金的极限拉伸强度（UTS），屈服强度（YS）和伸长率。当压力为400 MPa时，具有0.7％V的T6热处理HPRSC合金的UTS，YS和伸长率分别为301 MPa，182 MPa和3.3％。与β-Al的长度的减小₅硅铁阶段，HPRSC合金的质量指数增加。