Solute clustering in Al–Cu–Mg alloys during the early stages of elevated temperature ageing
By R. K. Marceau, G. Sha, R. Ferragut, A. Dupasquier, Simon P. Ringer. 2010
218 citations recorded by the source corpus.
Abstract The evolution of atomistic-level nanostructure during the early stages of elevated temperature ageing of rapid hardening (RH) Al–Cu–Mg alloys has been characterised by a combination of atom probe tomography (APT), transmission electron microscopy (TEM) and positron annihilation spectroscopy (PAS). APT analysis confirms that significant dispersions of small solute clusters form during ageing for 60 s at 150 °C. No zone-like precipitate structures were observed by TEM and APT examinations. These small clusters are believed to be responsible for the RH effect. Careful quantitative APT analysis reveals that a high density of Cu–Mg clusters with high Mg:Cu ratio gives the most potent strengthening response. Positron annihilation measurements also show that Cu–Mg clusters provide additional sites for vacancy stabilisation.
Subfields: Aerospace Engineering, Biomedical Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/ce9534042e7a9c2142ebc9fdb99b3f4448dabe98
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Citations in the corpus
- Solute-vacancy clustering in aluminum (2020, background): “However, this trend is inconsistent with the experimental observation that number density of the Cu-Mg clusters is comparable to Cu-Cu or Mg-Mg clusters and a few Cu-Mg cluster even grow the largest among all in size [2].”