COMPOSITION OF GUINIER-PRESTON ZONES IN Al-Zn-Mg ALLOYS.

G. Groma, E. Kovacs-Csetenyi, I. Kovacs, J. Lendvai, T. Ungár

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The composition of GP zones in the metastable equilibrium state at room temperature was studied in a series of Al-Zn-Mg alloys with Zn concentrations from 0 multiplied by (times) 72 to 2 multiplied by (times) 5 at. % and Mg concentrations from 0 multiplied by (times) 61 to 3 multiplied by (times) 33 at. %. It is found that the volume fraction of GP zones in the equilibrium state is determined by the Zn content of the alloys. The Zn concentration inside the GP zones was determined by X-ray small-angle scattering and was found to be 42 multiplied by (times) 2 at. % and that in the remaining matrix 0 multiplied by (times) 74 at. %. Further analysis gives the approximate positions and slopes of the tie-lines and the Mg concentrations in the metastable miscibility gap. With knowledge of the this gap, the contribution of GP zones to the electrical resistivity of the alloy in the state of metastable equilibrium at room temperature was determined. It is found that the electrical resistivity contribution per unit volume fraction of zones depends to a good approximation on the linear combination of the Zn and Mg concentrations in the zones.

Original languageEnglish
Pages (from-to)653-665
Number of pages13
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume40
Issue number5 pt 1
Publication statusPublished - Nov 1979

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Volume fraction
X ray scattering
Chemical analysis
Solubility
Temperature
miscibility gap
electrical resistivity
room temperature
slopes
matrices
approximation
scattering
Mg-Al-Zn-Mn-Si-Cu alloy
x rays

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics

Cite this

COMPOSITION OF GUINIER-PRESTON ZONES IN Al-Zn-Mg ALLOYS. / Groma, G.; Kovacs-Csetenyi, E.; Kovacs, I.; Lendvai, J.; Ungár, T.

In: Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, Vol. 40, No. 5 pt 1, 11.1979, p. 653-665.

Research output: Contribution to journalArticle

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