Characterization and high temperature mechanical properties in a duplex stainless steel

Authors

  • J. A. Jiménez Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • M. Carsí Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)
  • O. A. Ruano Centro Nacional de Investigaciones Metalúrgicas, CENIM (CSIC)

DOI:

https://doi.org/10.3989/revmetalm.1998.v34.iExtra.757

Keywords:

Duplex steels, Creep, Mechanical properties

Abstract


The microstructure and mechanical behavior at high temperature of a thermomechanical processed duplex stainless steel have been studied. Recrystalization of the material takes place during heating to test temperature, and a microstructure consisting of islands of austenitic grains of about 10-15 μm in size included in a more or less continuous matrix of ferrite is observed. Tensile tests at temperatures above 1,000°C and at low strain rates show a stress exponent of about 2 and elongations to failure up to 290 %. These values suggest that deformation is controlled by a grain boundary sliding mechanism, which causes a decrease in the size of the islands during deformation. Finally, an activation energy for plastic deformation of 167 kJ/mol was observed that was related to the activation energy for grain boundary diffusion of iron.

Downloads

Download data is not yet available.

Downloads

Published

1998-05-30

How to Cite

Jiménez, J. A., Carsí, M., & Ruano, O. A. (1998). Characterization and high temperature mechanical properties in a duplex stainless steel. Revista De Metalurgia, 34(Extra), 296–299. https://doi.org/10.3989/revmetalm.1998.v34.iExtra.757

Issue

Section

Articles

Most read articles by the same author(s)

1 2 3 4 > >>