Abstract

The submicrometre dispersoids containing iron in the aged AlLiCuMgZr alloy have been investigated by transmission electron microscopy combined with energy dispersive microprobe analysis. The dispersoids were identified as monoclinic Al 3Fe phase. They grow as elongated plates or may appear as randomly shaped particles. They are not single crystals but consist of two (or more) small grains, thus exhibiting complex selected area diffraction patterns owing to the superposition of several reflecting zones arising from different grains.

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