Annealing of vacancies and ageing in Al-Li alloys
作者： S. Ceresara , A. Giarda , A. Sanchéz
DOI: 10.1080/14786437708235975
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摘要: Abstract Quenching experiments have been carried out on a set of ‘dilute” Al-Li alloys by using resistivity measurements, and ‘concentrate” alloy containing 6·72 at. % Li, both electron microscopy. A value 0·25±0·03 eV has determined for the Li-vacancy binding energy. The recovery after quenching dilute up to 0·38 Li occurs in two stages as pure Al; first stage ascribed annealing vacancy-Li couples formed during quenching, whereas second one attributed elimination dislocation loops. By increasing content, some anomalies observed short-range order phenomena. concentrate decomposes ageing forming G.P. zones having an ordered Al3Li internal structure. High temperatures (≥500°C) prevent from reaching maximum, result reduction lifetime va...
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