Microstructures and Properties of V-Modified A380 Aluminum Alloy Produced by High Pressure Rheo-Squeeze Casting with Compound Field Treatment

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