Mechanical properties of Al–Fe–Cr aluminum matrix composites in the temperature range 77–573 K.

The article focuses on the mechanical and tribological behavior of Al–Fe–Cr aluminum matrix composites (AMCs) strengthened by nanoquasicrystalline (NQC) and/or crystalline phases across temperatures from 77 to 573 K. Among the studied alloys, the Al₉₄Fe₂Cr₂Ti₂ composite, reinforced by both NQC particles and crystalline intermetallic Al₂₃Ti₉, exhibited the highest strength (σ_b ≥ 3.87 GPa) at 573 K along with satisfactory plasticity (elongation to fracture δ ≥ 5% at 293 K). Tribological tests revealed that lubrication significantly improves wear resistance and reduces friction force, with the Al₉₄Fe₂Cr₂Ti₂ alloy showing optimal combined mechanical and tribological performance. The study highlights the potential of these AMCs for high-temperature applications, such as aviation, where weight reduction and cost efficiency are critical.