Microstructural change due to isochronal annealing in severely plastic-deformed commercial purity aluminium.

Microstructural changes, such as the density of grain boundary (GB) and dislocation density, due to isochronal annealing in severely plastic-deformed commercial purity aluminium up to 523 K was evaluated using electrical resistivity measurements and scanning transmission electron microscopy. Eventually, the GB density decreases from about 7.2  ×  106to about 2  ×  106 m−1, whilst the dislocation density decreases from an initial value of around 1.3  ×  1014 m−2down to around 4  ×  1013 m−2. [ABSTRACT FROM PUBLISHER]