Remarks on the evolution and performance of the different austenite morphologies at the simulated HAZs of a 2205 duplex stainless steel

E.V. Morales; J.A. Pozo; L. Olaya; E. Kassab; J.A.C. Ponciano; K. Ghavami; I.S. Bott

Journal of Materials Research and Technology (Sep 2019)

Remarks on the evolution and performance of the different austenite morphologies at the simulated HAZs of a 2205 duplex stainless steel

E.V. Morales,
J.A. Pozo,
L. Olaya,
E. Kassab,
J.A.C. Ponciano,
K. Ghavami,
I.S. Bott

Affiliations

E.V. Morales: Physics Department, Central University of Las Villas, Santa Clara, VC, CP 54830, Cuba; Chemical and Materials Engineering Department, Pontifical Catholic University of Rio de Janeiro/PUC-Rio, Rua Marques de S. Vicente 225, Gavea, Rio de Janeiro, RJ, CEP 22541900, Brazil; Corresponding author.
J.A. Pozo: Welding Research Center, Central University of Las Villas, Santa Clara. VC, CP 54830, Cuba
L. Olaya: Chemical and Materials Engineering Department, Pontifical Catholic University of Rio de Janeiro/PUC-Rio, Rua Marques de S. Vicente 225, Gavea, Rio de Janeiro, RJ, CEP 22541900, Brazil
E. Kassab: Chemical and Materials Engineering Department, Pontifical Catholic University of Rio de Janeiro/PUC-Rio, Rua Marques de S. Vicente 225, Gavea, Rio de Janeiro, RJ, CEP 22541900, Brazil
J.A.C. Ponciano: COPPE, Department of Metallurgical and Materials Engineering, Corrosion Laboratory, Ilha do Fundão, UFRJ, IF-B, Caixa Postal 68505, CEP21941-972, Rio de Janeiro, RJ, Brazil
K. Ghavami: Civil Engineering Department, Pontifical Catholic University of Rio de Janeiro/PUC-Rio, Rua Marques de S. Vicente 225, Gávea, Rio de Janeiro, RJ, CEP 22453-900, Brazil
I.S. Bott: Chemical and Materials Engineering Department, Pontifical Catholic University of Rio de Janeiro/PUC-Rio, Rua Marques de S. Vicente 225, Gavea, Rio de Janeiro, RJ, CEP 22541900, Brazil

Journal volume & issue: Vol. 8, no. 5
pp. 3936 – 3949

Abstract

Read online

Some features of the austenite micro structural evolution have been reviewed at the simulated HAZs (Heat Affected Zones) in a duplex stainless steel. The evolution of the different morphological forms of austenite was quantified in the microstructures for each simulated heat input. A detailed study of the micro structural parameters in the present study, allowed justifying the performance of the volume fractions corresponding to the three austenite morphologies on the HAZ mechanical properties and pitting corrosion resistance. Transmission electron microscopy showed the predominance of specific orientation relationships between the small intragranular austenite precipitates and ferrite considering the nitrogen content in the alloy and the transformation route. Keywords: Duplex stainless steel, Intragranular austenite, HAZ, Optical microscopy, Transmission electron microscopy, Mechanical properties

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal