The diffraction analysis of vacancy loops in quenched aluminium—1% magnesium

Abstract

Analysis of the diffraction contrast produced by parallelogram and other loops in quenched aluminium—1% magnesium indicates that all the loops are produced by vacancy agglomeration. Consideration of the parallelogram loops which lie on {012} planes shows the importance of knowing the exact crystallography of the loops being analysed. The vacancy result, which is of course expected, lends confidence to the geometrical method of analysis and shows that this can be used when the Burgers vector is not perpendicular to the loop.