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Hot compression tests on super austenitic stainless steel (SASS) are performed in the temperature range of 900–1200 °C and strain rates of 0.01–10 s −1 . The results reveal that, at lower deformation temperatures of 900 and 1000 °C or lower strain rates of 0.01 s −1 , 0.1 s −1  and 1 s −1 , the dominant DRX mechanism of SASS can be summarised as: a large number of high-angle grain boundaries (HAGBs) are gradually developed from low-angle grain boundaries (LAGBs) and DRX grains are partially formed on HAGBs. However, the formation of DRX grains due to sub-grain rotation is the main DRX mechanism at higher temperatures of 1100 °C and 1200 °C and at the higher strain rate of 10 s −1 .

Effect of hot deformation parameters on dynamic recrystallisation mechanisms of super austenitic stainless steel