Early stages of precipitation in Al-Li alloys

Janos Lendvai, Hans Joachim Gudladt

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The initial stages of precipitation in supersaturated binary Al-Li solid solution alloys are discussed. Results of experimental investigations referring mostly to ageing at or near room temperature are reviewed and compared with predictions of theoretical treatments. In alloys containing more than about 7 at.% Li a fast continuous ordering (spinodal ordering) takes place before the somewhat slower decomposition. There are indications that the decomposition starts with a homogeneous nucleation in the ordered matrix. In artificially aged samples further precipitation takes place during the subsequent room temperature storage by nucleation within the disordered matrix phase. The ordered nature of the precipitates determines their interaction with dislocations and thereby their effect on the mechanical properties of the precipitation-hardened alloy.

Original languageEnglish
Pages (from-to)242-247
Number of pages6
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume84
Issue number4
Publication statusPublished - Apr 1 1993

ASJC Scopus subject areas

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

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