Skip to main content
Article thumbnail
Location of Repository

Reply to the comments on “Room-temperature precipitation in quenched Al-Cu-Mg alloys: a model for the reaction kinetics and yield-strength development”

By M.J. Starink, A. Cerezo, J.L. Yan and N. Gao


Our recent work on Al-Cu-Mg-based alloys with Cu:Mg ratio close to unity showed that the rapid hardening at room temperature and the substantial heat evolution arising from the formation of Cu-Mg co-clusters. Here, it is shown that the measured enthalpy of formation of clusters (similar to 0.3 eV per Mg atom) is in reasonable agreement with expectations based on the similarity with Mg-vacancy clusters. The origin of the term GPB zones, as applied to the rapid hardening in Al-Cu-Mg-based alloys, is investigated. It is shown that current knowledge on the nanostucture and microstructure development during rapid hardening can be described without recourse to this alloy-specific term. Analysis of the kinetics of Cu-Mg co-clusters formation by DSC indicates that the formation of Cu-Mg co-cluster formation during a fast water quench can be sufficiently suppressed to cause substantial nucleation of co-clusters to occur in subsequent natural ageing and artificial ageing at low temperatures

Topics: TN, QC
Year: 2006
OAI identifier:
Provided by: e-Prints Soton

Suggested articles


  1. (1976). Aluminium Alloys: Structure and Properties (Butterworths,
  2. (1919). Sci Paper.
  3. (1995). Structure and Structure Development of Al–Zn Alloys (Akademie Verlag,
  4. (1975). The Theory of Transformation

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.