The influence of Li on the nucleation of defects in quenched Al-Li alloys

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Acta Metallurgica et Materialia; (United States)

OSTI ID:7087183

Rio, J del; Diego, N de ^[1]; Plazaola, F ^[2]

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1. Univ. Complutense, Madrid (Spain). Dept. de Fisica de Materiales
2. Euskal Herriko Unibertsitatea, Bilbao (Spain). Elektronika Saila

The nucleation and kinetics of defects formed by quenching in two Al-Li alloys having Li content of 1.7 and 3.74 at.% Li have been studied by positron annihilation spectroscopy. It has been found that the defect formation is sensitive to the aging time at the temperature from which the samples are quenched. This fact has been related to the Li loss experienced by the alloys aged at high temperature. The quenched-in defects have been identified as vacancy-Li clusters and dislocation loops. The latter are formed by the collapse of the Li-rich vacancy complexes and are very sensitive to the Li content; as a consequence, the loops are decorated by Li-rich zones and are revealed as very effective positron traps in comparison to the vacancy-Li complexes, giving rise to an enhanced trapping.

• OSTI ID: 7087183
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:7; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALKALI METALS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
LITHIUM
LITHIUM ALLOYS
METALLURGICAL EFFECTS
METALS
NUMERICAL DATA