Dynamic Recovery and Recrystallization in a Duplex Stainless Steel

Abstract

Dynamic restoration processes in a duplex stainless steel containing 50 vol % austenite have been investigated by compression testing at 900 C. For strain rates ≤ 0.038 sec–1 a peak was not observed in the stress-strain curve and softening occurred mainly through dynamic recovery of the ferrite. At a strain rate ≳ 0.038 sec–1 a peak was detected which was consistent with the occurrence of dynamic recrystallization in the austenite. The progressive development of the hot-worked structures, for strain rates between 0.0038 − 0.38 sec–1, is discussed in relation to the forms of the stress-strain curves.