Abstract
The Al-Zr-Ti system has recently been suggested as a candidate for Al-based materials capable of retaining a high strength during a long term exposure to high temperatures up to 700 K. The Al-1.25at.%(Zr+Ti) alloys with a variable Zr : Ti ratio were rapidly solidified using the chill block melt spinning method. The homogeneity of the chemical composition was verified using the energy dispersive (EDX) and wave dispersive (WDA) X-ray analysis methods. The investigation of the phase composition of as-melt spun ribbons performed using the small angle X-ray scattering (SAXS) method revealed the presence of second-phase particles. In Zr-rich alloys, the fine second-phase particles were identified to be formed by the metastable Al₃(Zr_xTi_1-x) phase with the cubic L1₂ structure. The coarse particles present in the Ti-rich alloys were preferably constitutional particles in the spectrum of which Fe was found.

Key words
Al-based alloy for elevated temperatures, rapid solidification, chemical and phase composition, X-ray analysis

Full text (4380 KB)