Experimental and theoretical results permitted the determination of the absolute values of stacking-fault energies of face-centered cubic metals from the stress-strain curves of single crystals. The activation energy for the cross-slip of screw dislocations was calculated as a function of the stacking-fault energy, the applied shear stress and the size of the piled-up dislocation groups. An experimental value for the activation energy for cross-slip in Cu was deduced from the strain-rate dependence of the shear stress at the beginning of stage-III of the stress-strain curve. Comparison between experiment and theory gave a stacking-fault energy of 170mJ/m2.

Die Experimentelle Bestimmung von Stapelfehlerenergien Kubisch-Flächenzentrierter Metalle. A.Seeger, R.Berner, H.Wolf: Zeitschrift für Physik, 1959, 155[2], 247-62