Ordering of substoichiometric delta-TiCx phase in Ti-V-C alloys

Several Ti-V-C alloys have been studied by transmission electron microscopy (TEM) after cooling from the melt, with special attention paid to ordering processes taking place in the highly substoichiometric (Ti,V)C-x phase. Th e effects of both short and long range ordering in the carbon sublattice ar e observed in selected area electron diffraction patterns. The Warren-Cowle y short range order parameters have been evaluated from the intensity distr ibution in reciprocal space. More complex models for the intensity distribu tion are then developed and the effects on the predicted short range order parameters are discussed.