The deformation-induced dissolution of δ1 precipitates in Al-Li alloys

J. Lendvai, H. J. Gudladt, V. Gerold

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

By calorimetric investigations we have shown that small ordered δ1 precipitates formed during RT ageing after quenching or subsequent to artificial ageing in Al-Li alloys become unstable and redissolve in the course of plastic deformation. The most important factor leading to this dissolution is the increase in free enthalpy introduced by the formation of an antiphase boundary when the ordered particles are sheared by dislocations. A simple model yielding the critical size for redissolution is described. The model, which could be applied to other materials with similar microstructure as well, predicts an increase in critical size with increasing specific surface and antiphase boundary energy and a decrease in critical size with increasing gain in free enthalpy per unit volume of precipitates.

Original languageEnglish
Pages (from-to)1755-1760
Number of pages6
JournalScripta Metallurgica
Volume22
Issue number11
DOIs
Publication statusPublished - 1988

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Precipitates
precipitates
Enthalpy
dissolving
Dissolution
antiphase boundaries
Aging of materials
enthalpy
Quenching
Plastic deformation
Microstructure
plastic deformation
quenching
microstructure
energy

Cite this

The deformation-induced dissolution of δ1 precipitates in Al-Li alloys. / Lendvai, J.; Gudladt, H. J.; Gerold, V.

In: Scripta Metallurgica, Vol. 22, No. 11, 1988, p. 1755-1760.

Research output: Contribution to journalArticle

Lendvai, J. ; Gudladt, H. J. ; Gerold, V. / The deformation-induced dissolution of δ1 precipitates in Al-Li alloys. In: Scripta Metallurgica. 1988 ; Vol. 22, No. 11. pp. 1755-1760.
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