The impact of equal-channel angular pressing (ECAP) on the microstructure of an
Al-Cu-Mg alloy has been investigated using transmissio electron microscopy and electron
backscatter diffraction. A combination of an ultrafine-grained and bimodal structure was
observed in the alloy as a result of ECAP processing. The ECAP-processed samples after
tensile tests and cyclic loads have demonstrated an enhanced ultimate tensile strength and
fatigue endurance limit in comparison with the properties of the samples subjected to the
standard T6 treatment.
Keywords: ultrafine-grained Al-Cu-Mg alloy; microstructure; strength; fatigue.
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