EFFECT OF PREMILLING ELEMENTAL POWDERS ON SOLID SOLUBILITY EXTENSION OF MAGNESIUM IN TITANIUM BY MECHANICAL ALLOYING

Solid solubility extension of magnesium in titanium was obtained by mechanical alloying of blended elemental powders. The solubilities achieved varied with the processing variables used. A maximum solubility of 3.6 at% (1.9 wt%) magnesium in titanium (representing a 3% density decrease) was achieved when both the titanium and magnesium powders were premilled separately and then mechanically alloyed together. This compares with the equilibrium solid solubility of 0.2 at% (0.1 wt%) Mg in Ti at 500 degrees C. As the temperature of milling was lowered, the solubility level was reduced.