Faulted defects in quenched copper and silver

Abstract

High densities of faulted dislocation loops and stacking-fault tetrahedra have been observed in quenched copper and silver. In copper, the loops are polygonal with edges along directions and vary in size up to 11 500 Å. On annealing, these large loops develop many additional edges along directions. In silver, many of the faulted loops are complex in that different portions of the same loop lie on different [111] planes. The loops in silver are very stable and do not anneal out until 635°c.