STUDY OF STRUCTURAL AND MECHANICAL-BEHAVI OR OF PM ALUMINUM IRON-ALLOYS PRODUCED BY SINTER-FORGING

This paper concerns Al-3 % Fe and Al-8 % Fe-1 % Zr (% mass) alloys ela borated by sinter-forging from air atomized powders. The powders used are only slightly oversaturated. The precipitation processes were foll owed by differential scanning calorimetry and the corresponding activa tion energy was determined. The Al-O connection was shown, even after abrasion. On the other hand, no Fe-O or Zr-O connection could be detec ted. The maximal load at rupture R(m) of the materials forged from the Al-Fe-Zr powder is clearly higher than the one of Al-Fe materials. Th e morphology of the rupture face is of the <<interparticle>> type, for the most part.