FORMATION OF GUINIER-PRESTON ZONES IN THE Al-4. 8 wt. % Zn-1. 2 wt. % Mg ALLOY STUDIED BY X-RAY SMALL ANGLE SCATTERING.

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Abstract

The decomposition of the solid solution state in the Al-4. 8 wt. % Zn-1. 2 wt. % Mg alloy was studied in the temperature range between room temperature and 140 degree C. It was found that in the temperature range between 60 and 100 degree C, two different types of Guinier-Preston (GP) zones are formed with different average dimensions and thermal stability. Below 60 degree C, the decomposition takes place by the formation of the smaller, GPI zones only. Above 100 degree C the solid solution decomposes by the formation of the eta prime transition phase. It was found that the zones with larger mean size, i. e. GPII, can transform into nuclei or particles of the eta prime phase at temepratures around 100 degree C.

Original languageEnglish
Pages (from-to)739-745
Number of pages7
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume70
Issue number11
Publication statusPublished - Jan 1 1979

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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