From measurements of the radius of curvature of extended dislocation nodes observed by transmission electron microscopy, stacking-fault energies were determined for Cu-based solid solution alloys. A rough estimate of about 40mJ/m2 was made of the stacking-fault energy of Cu.

Direct Measurements of Stacking-Fault Energies from Observations of Dislocation Nodes. A.Howie, P.R.Swann: Philosophical Magazine, 1961, 6[70], 1215-26