Al-Fe粉末合金の組織と機械的性質の関係

抄録

The relationship between structure and mechanical properties of extruded Al-210%Fe powder metallurgy (P/M) alloys was investigated. The yield strength (σ_0.2) is related to the volume fraction of dispersoids (V_f) and the average dispersoid radius(r): σ_0.2∝V_f^3/2•r^-1. This relationship suggests that higher V_f and smaller r result in higher strength. Increase of Fe content raises the strength of Al-Fe alloy because of the increase of volume fraction of dispersoids. Annealing at the temperature above 400°C lowers the strength of Al-8%Fe alloy because of coarsening of dispersoids.