Portevin-Le Chatelier effect in austenitic steel Fe-18%Cr-8%Ni

Abstract

The study of the mechanical behavior of the austenitic Fe-18% Cr-8% Ni steel was carried out in the temperature range of 530°C - 680°C at a strain rate of 1×10−3 s−1, as well as at a temperature of 620°C and strain rates of 1×10−2 s−1 - 1×10−4 s−1. At these conditions, the PLC effect was observed. Type A serrations were observed in the temperature range 530 - 680°C. A decrease in the strain rate at a temperature of 620°C leads to a change in the type of serrations from type A to type B.

Characterization of the spatiotemporal behavior of the PLC bands in austenitic steel during deformation at elevated temperature

“…The steel specimens were annealed at 1150 • C for 1 h and then quenched in water. After heat treatment the average grain size of ~ 14 μm; dislocation density of approximately 2.7 × 10 12 m − 2 ; and discovered Nb(C,N) particles with a spherical shape and average size of 174 nm were observed [11].…”