Specific features of temperature-and strain-induced order-disorder phase transitions

The regularities of temperature-and strain-induced order-disorder phase transitions are determined from analyzing X-ray diffraction data. The results obtained are used to reveal common features in order-disorder transformations induced under energy actions of different types. It is established that, in both cases, the transition from the long-range order state to the short-range order state is accompanied by an increase in the number of defects in the structure of the alloy and the most rapid decrease in the long-range order parameter is associated with the generation of antiphase boundaries and their smearing.