Abstract
A good high-temperature stability of microstructure and strength has been recently found in Al-1.25at.%(Zr+Ti) alloys rapidly solidified using the chill block melt spinning method. In order to prepare a bulk material an alternative processing route consisting of high-energy gas atomisation and suitable consolidation was chosen. The supersaturation of the matrix of the consolidated material by Zr and Ti atoms was significantly lower than that in the melt spun ribbons of the same material. No fan-shaped configuration of the L12 modification of the Al₃(ZrxTi1-x) phase was observed in the consolidated materials and, therefore, the microhardness in both as-received and aged states was significantly lower than that of the as-melt spun material. The long term stability of the microhardness is similar in both types of material.

Key words
Al-1.25at.%(Zr+Ti) alloys, gas atomisation, chemical and phase composition, microstructure, microhardness, tensile tests

Full text (469 KB)