Author/Authors :
Kevanlo، E. نويسنده Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar, Iran , , EBRAHIMI NEJAD، G. نويسنده , , Sani، S. A. A. نويسنده Department of Materials Science and Engineering, Iran University of Sience and Technology, Tehran, Iran , , Momeni ، A. نويسنده Department of Materials Science and Engineering, Hamedan University of Technology, Hamedan, Iran ,
Abstract :
In this work dynamic recrystallization behavior of AISI 403 martensitic stainless steel
was studied using hot compression tests over temperature range of 900°C -1200°C and strain rate
range of 0.001 s-1-1 s-1. The obtained flow curves showed that the hot compression behavior of the
alloy is controlled by dynamic recrystallization. The flow stress and strain corresponding to the
critical, peak and onset of steady state region were related to the Zener-Hollomon parameter using
simple power equations. The variation of dynamic recrystallization fraction with strain showed
that restoration kinetics is enhanced with increasing the temperature and decreasing the strain rate.
The development of DRX was modeled using Avrami Kinetics equation. The equations proposed
by Baragar and Cingara-McQueen were used to develop a new model capable of predicting the
flow curves up to the onset of steady state flow region. This softening work is mainly controlled
by the phenomenon of dynamic recrystallization.
