Enhancement of Mechanical Properties of Pure Aluminium through Contactless Melt Sonicating Treatment

A new contactless ultrasonic sonotrode method was previously designed to provide cavitation conditions inside liquid metal. The oscillation of entrapped gas bubbles followed by their final collapse causes extreme pressure changes leading de-agglomeration and the dispersion oxide films. forced wetting particle surfaces degassing are other mechanisms that considered be involved. Previous publications showed a significant decrease in grain size using this technique. In paper, authors extend research strength measurements demonstrate an improvement cast quality. Degassing effects also interpreted illustrate main involved alloy strengthening. mean values Weibull analysis presented where appropriate complete data. test results on Al demonstrated maximum 48% refinement, 28% increase elongation compared 16% for untreated material up 17% ultimate tensile (UTS). Under promoting degassing, hydrogen content reduced 0.1 cm3/100 g.