Mechanical properties and superplasticity of AlZnMg alloys with copper and zirconium additions

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of copper and zirconium upon the high‐temperature mechanical properties and the deformation mechanisms of Al‐5.7 wt% Zn‐2.0 wt% Mg alloys is studied. Results of impression creep and tensile tests show that the addition of Cu increases the strength of the material, and strongly enhances dynamic recovery during high‐temperature deformation. In the case of the ternary AlZnMg alloy the main rate‐controlling process is viscous glide, but in the alloy containing 1.4 wt% addition of Cu the strain rate is controlled by dislocation climb (10−6s−1 < \documentclass{article}\pagestyle{empty}\begin{document}$ 10^{ - 6} s^{ - 1}<\dot \varepsilon<10^{ - 2} s^{ - 1} $\end{document} and 400°C < T < 520°C). The addition of 0.14 wt% Zr to the AlZnMgCu alloy results in a fine‐grained micro‐structure due to which the material exhibits superplastic properties at high temperatures with grain boundary sliding as the dominant process during superplastic deformation.

Original languageEnglish
Pages (from-to)583-599
Number of pages17
Journalphysica status solidi (a)
Volume149
Issue number2
DOIs
Publication statusPublished - Jun 16 1995

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Mechanical properties and superplasticity of AlZnMg alloys with copper and zirconium additions'. Together they form a unique fingerprint.

  • Cite this