Compaction of fly ash–aluminum alloy composites and evaluation of their mechanical and acoustic properties

摘要: Abstract The density and elastic moduli of green compacts can be determined by ultrasonic method with the help pre-prepared diagrams. In this way, pressing conditions taken under control easily. study, fly ash particles were used as fillers in an aluminum alloy matrix material. weight fractions composites range 5–30%. resulting compacted at pressures ranging from 63 MPa to 316 MPa. It was observed that increased increasing compacting pressure decreased percent lightweight composites. compact also tested using non-destructive evaluation method. Results showed velocities are a strong function fraction material could potentially predict well metal composite.