Formation of Dislocation Loops at Low Temperatures in Quenched Aluminum

摘要: Formation of dislocation loops in aluminum below room temperature down to -90°C is studied by the two step aging method after quenching. The beginning stage vacancy clustering similar that around temperature, small clusters growing have a fairly wide range their size weak bindings and well defined nucleus loop does not exist. It concluded main part played quenched-in di-vacancies, especially at low temperatures. Two kinds influences impurity atoms are found. major influence enhance formation loops, but increase stability enough make stable nuclei loops.