Configurational Energy Change Caused by Slip in Short‐Range Ordered Ni–Mo

Based on short‐range order parameters determined from X‐ray diffuse scattering measurements on a Ni–11.2 at% Mo single crystal and effective pair potentials obtained from applying the inverse Monte‐Carlo method, the configurational energy change caused by the successive slip of a variable number of unit dislocations on the same {111} plane is calculated. A fraction of 97% of the diffuse antiphase boundary energy of 25 mJ/M2 has to be provided by the first slip step. The glide of subsequent dislocations on the same glide plane is thus favored which leads to planar slip as observed by transmission electron microscopy. Monte‐Carlo simulations also show that the diffuse antiphase boundary energy depends more sensitively on the concentration of the alloy than on the temperature where thermodynamic equilibrium was established.