Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/jspui/handle/123456789/14254
Title: Effect of PWHT on laser-welded duplex stainless steel : the effects of postweld heat treatments on the microstructure, tensile behavior, and corrosion resistance of laser-welded duplex stainless steel were investigated.
Authors: Magalhaes, Aparecida Silva
Magalhães, Charles Henrique Xavier Morais
Lima, Milton Sérgio Fernandes de
Alves, Juliane Ribeiro da Cruz
Godefroid, Leonardo Barbosa
Bertazzoli, Rodnei
Faria, Geraldo Lúcio de
Keywords: Laser welding
Duplex stainless steel
Corrosion
Postweld heat treatment
Issue Date: 2020
Citation: MAGALHAES, A. S. et al. Effect of PWHT on laser-welded duplex stainless steel: the effects of postweld heat treatments on the microstructure, tensile behavior, and corrosion resistance of laser-welded duplex stainless steel were investigated. Welding Journal, v. 99, artigo 185, jul. 2020. Disponível em: <https://s3.amazonaws.com/WJ-www.aws.org/supplement/2020.99.018.pdf>. Acesso em: 12 set. 2021.
Abstract: The welded joints of duplex stainless steels (DSSs) have been widely used in petrochemical, nuclear, pulp, and paper industries. Welds require a good, superficial finishing and a combination of mechanical and corrosion properties in these types of high-quality, demanding applications. Even though laser welding promotes narrow weld beads and a small heataffected zone, when it is applied to DSSs, it can produce dangerous microstructural discontinuities. In this context, the effects of subsequent heat treatments on the microstructure, corrosion resistance, microhardness, and tensile properties of DSS laser-welded joints are investigated. In this study, samples of UNS S32304 DSS were submitted to two different conditions of laser welding. Subsequently, the plates submitted to the best welding condition were subjected to isothermal heat treatments at different temperatures (850°, 950°, 1050°, and 1150°C) for 10 min. Then they were microstructurally characterized. Phase fraction measurements and microhardness tests were performed. Based on the obtained results, postweld heat-treated samples at 1150°C, which is the best condition, were subjected to corrosion and tensile tests. It was possible to conclude the corrosion properties of the welded joint were significantly improved after the heat treatment. However, the mechanical behavior was strongly influenced by the presence of volumetric discontinuities and intermetallic compounds, which considerably deteriorated the mechanical strength of the material.
URI: http://www.repositorio.ufop.br/jspui/handle/123456789/14254
metadata.dc.identifier.uri2: https://doi.org/10.29391/2020.99.018
metadata.dc.identifier.doi: https://s3.amazonaws.com/WJ-www.aws.org/supplement/2020.99.018.pdf
ISSN: 0043-2296
Appears in Collections:DEMET - Artigos publicados em periódicos

Files in This Item:
File Description SizeFormat 
ARTIGO_EffectPWHTLaser.pdf
  Restricted Access
4,24 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.