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The deformation behavior and dynamic recrystallization (DRX) mechanism of lean duplex stainless steel 2101 under hot compression were studied by means of optical microscopy and electron backscatter diffraction. Hot compression tests were performed at a temperature of 1 100 °C and strain rate of 0.01 s −1 , and also at a temperature of 1 000 °C and strain rate of 30 s −1 . The flow curves exhibit typical DRX characteristics, and the flow stress increases to a peak stress followed by work softening at higher strains. When the alloy was deformed at 1 000 °C and the strain rate of 30 s −1 , new ferrite grains formed through a distinct DRX mechanism occurring in the vicinity of the δ/γ interface. When the alloy was deformed at 1 100 °C and strain rate of 0.01 s −1 , a small number of fine γ phase grains distributed both in the δ ferrite matrix and at δ/γ interfaces. The refinement of γ phase was expected to form by dynamic strain induced δ to γ transformation and discontinuous dynamic recrystallisation (DDRX) mechanisms.

Microstructural characterization of dynamic recrystallization in hot deformed LDX2101