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  Induction-assisted laser beam welding of a thermomechanically rolled HSLA S500MC steel: A microstructure and residual stress assessment

Coelho, R. S., Corpas Garcia, M., Moreto, J. A., Jahn, A., Standfuß, J., Kaysser-Pyzalla, A. R., et al. (2013). Induction-assisted laser beam welding of a thermomechanically rolled HSLA S500MC steel: A microstructure and residual stress assessment. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 578, 125-133. doi:10.1016/j.msea.2013.04.039.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E2DC-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E2DD-7
Genre: Journal Article

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 Creators:
Coelho, Rodrigo Santiago1, 2, Author              
Corpas Garcia, Maria3, Author              
Moreto, Jéferson Aparecido4, Author              
Jahn, Axel5, Author              
Standfuß, Jens5, Author              
Kaysser-Pyzalla, Anke Rita2, 6, Author              
Pinto, Haroldo Cavalcanti3, 4, Author              
Affiliations:
1Microstructure Characterization, Material Diagnostics and Steel Technology, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863365              
2Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin, Germany, persistent22              
3Materials Testing, Material Diagnostics and Steel Technology, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863363              
4Universidade de São Paulo, Escola de Engenharia de São Carlos, CEP 13566-590 São Carlos, SP, Brazil, persistent22              
5Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS, Winterbergstr. 28, 01277 Dresden, Germany, persistent22              
6Material Diagnostics and Steel Technology, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863361              

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Free keywords: Austenite-to-ferrite transformation; Hardness distribution; HSLA steel; Martensite Formation; Tensile residual stress; Thermal contraction; Transformation temperatures; Welding procedures, Carbon dioxide; Heat affected zone; Induction heating; Microstructure; Neodymium lasers; Residual stresses, Laser beam welding
 Abstract: The present work deals with the effect of different combinations of induction heating and autogenous CO2 laser welding on the gradients of microstructure, microhardness and residual stresses in butt-joints of thermomechanically processed S500MC steel grade. Five strategies were pursued by varying the inductor position with respect to the laser beam. This enabled in-line pre-, post-, and simultaneous pre- and post-heating as well as annealing of the fusion and heat-affected zones. The induction-assisted CO2 laser welding strategies were compared to individual CO2 and Nd:YAG fiber welding procedures. The results demonstrate that induction heating can be combined to laser welding in order to effectively increase the cooling times. Martensite formation could be suppressed within the fusion and heat-affected zones and smooth hardness distributions were obtained by pre-heating and combined pre- and post-heating. The tensile residual stresses are, however, still of significance because of the high transformation temperatures (gt;500°C) observed for the S500MC steel. This allowed for extensive thermal contraction after exhaustion of the austenite to ferrite transformation. © 2013 Elsevier B.V.

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Language(s): eng - English
 Dates: 2013-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.msea.2013.04.039
BibTex Citekey: Coelho2013125
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Title: Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
  Abbreviation : Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process.
Source Genre: Journal
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Publ. Info: New York, NY : Elsevier
Pages: - Volume / Issue: 578 Sequence Number: - Start / End Page: 125 - 133 Identifier: ISSN: 0921-5093
CoNE: /journals/resource/954928498465_1