Paper Title:
Influence of Zr on the Microstructure and Mechanical Properties of an Al-Zn-Mg-Cu Alloy
  Abstract

Recently, a new super-high-strength Al-Zn-Mg-Cu alloy with Zr bearing was developed in BIAM. In this paper, the effect of microalloying element Zr on the microstructure and mechanical properties of the alloy was investigated. It was found that the influence of Zr on the microstructure and age-hardening behaviors was remarkable. The strength of the alloy increases with increasing the content of zirconium, and the peak value of the elongation appeared when the content of Zr was 0.06%(mass fraction) and then decreases. The fracture behavior was also studied. The result shows that the fracture mechanism of the alloy was converted from intergranular brittle to transgranular ductile model with increasing the content of zirconium. Finally, the optimum contents of Zr in the alloy were proposed as 0.10%~0.14%.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1069-1076
DOI
10.4028/www.scientific.net/MSF.546-549.1069
Citation
S. J. Yang, Y. H. Xie, S. L. Dai, M. G. Yan, "Influence of Zr on the Microstructure and Mechanical Properties of an Al-Zn-Mg-Cu Alloy", Materials Science Forum, Vols. 546-549, pp. 1069-1076, 2007
Online since
May 2007
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$32.00
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