Phase transformations during deformation of high-manganese alloy G22

Conclusions

• 1. It was established that in the process of deformation the ε phase may transform to γ phase not only at temperatures where the ε→γ transformation occurs during heating but also at lower temperatures.

• 2. The formation of γ phase is martensitic in character. The transformation of ε phase into γ phase is possible when the accumulation of hep stacking faults reaches a certain level.

• 3. The reversibility of the γ⇌ε transformations during deformation was established.

• 4. The mechanical properties of high-manganese alloy G22 depend on the ε⇌γ transformation that oceurs under load, since plastic deformation may result from the latter. As in the direct γ⇌ε and γ⇌α transformations, this transformation facilitates relaxation processes.