DAVID C. BROWN
Published: 1961
Total Pages: 1
Get eBook
An investigation of the effects of electromagnetic stirring and sonic vibration on weld microstructures, porosity, physical properties, and weld shape has been made using 5183 aluminum filler alloy (aluminum - 4 1/2% magnesium alloy). Grain refinement and elimination of the characteristic dendritic weld metal solidification pattern was the principal effect found. The results show no beneficial effect on properties, and no degassing tendency. The degree of grain refinement obtained with electromagnetic stirring and impact vibration was compared to that obtainable with heterogeneous inoculation. The latter method of grain refinement is the most effective although, again, no beneficial effect on properties was determined. A Viscous Shear Theory is offered to account for the grain refinement obtained with stirring and vibration. (Author).