A study of the microstructural evolution of a commercial 7012 (Al–Zn–Mg–Cu) age-hardenable alloy following artificial ageing by high resolution and conventional transmission electron microscopy and positron annihilation lifetime spectroscopy is presented. At the early stages of decomposition, the microstructure included precipitation of either pre-precipitate solute clusters or Guinier–Preston zones and semicoherent η′ precipitates, with typical sizes between 1 and 10 nm. Quantitative information on the size, number density and morphology of the particles present in the microstructure was obtained. The results were correlated with those obtained using positron annihilation lifetime spectroscopy.
|Titolo:||Pre-precipitation Study in the 7012 Al-Zn-Mg-Cu Alloy by Electrical Resistivity.|
|Data di pubblicazione:||2002|
|Appare nelle tipologie:||01.1 Articolo in Rivista|
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|Ferragut et al MatSciEngA 2002.pdf||PDF editoriale||Accesso riservato|