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 me chanical alloying of blended elemental powders. The solubilities achie ved varied with the processing variables used. A maximum solubility of 3.6 at% (1.9 wt%) magnesium in titanium (representing a 3% density de crease) was achieved when both the titanium and magnesium powders were premilled separately and then mechanically alloyed together. This com pares 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 s olubility level was reduced.