PLASTIC-DEFORMATION OF QUASI-CRYSTALLINE AND CRYSTALLINE PHASES IN AL-CU-FE ALLOYS

In Al-Cu-Fe alloys plastic deformation of quasi-crystalline as well as related crystalline phases were studied by hot compression test, micr ohardness and toughness measurements. The microstructure of the alloys was investigated by transmission electron microscopy before and after hot compression tests. The dislocation density increases significantl y after the deformation process of the quasi-crystalline phases thus i ndicating a dislocation-controlled deformation mechanism. The observed dislocation density, however, is assumed to be too small for the intr oduced deformation and is probably more typical for a microstructure a fter annealing out of defects.