Paper Title:
Research on Solution and Aging Treatment of Mg-7Zn-3Al Alloy
  Abstract

Effect of solution and aging treatment on the microstructure of Mg-7Zn-3Al alloy is studied by using optical microscopy, scanning electron microscopy, X-ray diffraction, transmission electron microscopy and quantitative image analysis. The results show that the as-aged microstructure is composed of α-Mg matrix, grain boundary τ (Mg32(Al,Zn)49 ) phase, and fine dispersed τ particles inside the grain. The solution degree has significant effects on the formation, morphology, and size of the grain boundary τ phase. The volume fraction and the size of the undissolved eutectic τ phase decrease with the increase of solution time treated at 325°C. Through sufficient solution treatment, discontinuous eutectic τ phase retains fine strip morphology after aging, in contrast to the microstructure in sample undergone insufficient solution which manifests as-cast feature, while at the same time nano-sized particles precipitate out from the matrix. The precipitates display paralleled short bar, having certain orientation relationship with the matrix.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
247-250
DOI
10.4028/www.scientific.net/MSF.561-565.247
Citation
J. Zhang, F. S. Pan, R. L. Zuo, "Research on Solution and Aging Treatment of Mg-7Zn-3Al Alloy", Materials Science Forum, Vols. 561-565, pp. 247-250, 2007
Online since
October 2007
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Price
$32.00
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