Precipitation and strengthening in aluminium alloys

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

Different transformation paths leading to the precipitation of the hardening phase are discussed in two important age-hardenable aluminium alloy systems, the Al-Zn-Mg and the Al-Li alloys. In Al-Zn-Mg alloys the role of GP zones and of vacancy rich clusters in the nucleation of the η' phase, as well as the reversion of GP zones is considered. In Al-Li alloys the precipitation of the Ll2 ordered, δ' (Al3Li) particles may progress through a variety of transformation stages, including short- and long-range ordering, and decomposition. Both ordering and decomposition may take place by nucleation and growth or by spinodal mechanism, increasing thereby the number of the possible combinations of consecutive transformation steps. The often returning question of the existence of GP zones in Al-Li alloys, as a precursor phase physically different from δ' is also discussed. Experimental results on the particle strengthening in the two alloys are correlated with theory.

Original languageEnglish
Pages (from-to)43-56
Number of pages14
JournalMaterials Science Forum
Volume217-222
Issue numberPART 1
Publication statusPublished - 1996

Fingerprint

Strengthening (metal)
aluminum alloys
Aluminum alloys
Nucleation
Decomposition
nucleation
decomposition
Vacancies
Hardening
hardening

Keywords

  • Al-Li alloys
  • Al-Zn-Mg alloys
  • Guinier-Preston zones
  • Nucleation
  • Particle strengthening
  • Reversion

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Precipitation and strengthening in aluminium alloys. / Lendvai, J.

In: Materials Science Forum, Vol. 217-222, No. PART 1, 1996, p. 43-56.

Research output: Contribution to journalArticle

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