Welding effects on the mechanical integrity of a TRIP800 steel: A comparison of laser CO2 and GMAW processes

  1. Perez-Medina, G.Y. 1
  2. Lopez, H.F. 2
  3. Reyes-Valdés, F.A. 1
  4. Garza-Gomez, A. 1
  5. López-Ochoa, L.M. 3
  1. 1 Corporación Mexicana de Investigación en Materiales Calle Ciencia y Tecnología, #790, Fracc. Saltillo 400, Saltillo, Coah, Mexico
  2. 2 University of Wisconsin–Milwaukee
    info

    University of Wisconsin–Milwaukee

    Milwaukee, Estados Unidos

    ROR https://ror.org/031q21x57

  3. 3 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

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Revue:
Archives of Metallurgy and Materials

ISSN: 1733-3490

Année de publication: 2014

Volumen: 59

Número: 4

Pages: 1427-1432

Type: Article

DOI: 10.2478/AMM-2014-0243 SCOPUS: 2-s2.0-84924571694 WoS: WOS:000348592300028 GOOGLE SCHOLAR

D'autres publications dans: Archives of Metallurgy and Materials

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Résumé

In this work a strip of a transformation induced plasticity (TRIP) steel was welded using gas metal arc welding (GMAW) and Laser CO2 welding (LBW) processes and the resultant strength and ductility of the welded joints evaluated. It was found that LBW lead to relatively high hardness in the fusion zone, FZ where the resultant microstructure was predominantly martensite. The relative volume fractions of phases developed in the welded regions were quantitatively measured using color metallography combined with X-ray diffraction analyses. It was found that the heat affected zone, HAZ developed the maximum amount of martensite (up to 32%) in the steel welded using LBW besides a mixture of bainite, retained austenite and ferrite phases. In contrast, a relatively low percent of martensite (10.8%) was found in the HAZ when the GMAW process was implemented. © 2014, Committee of Metallurgy. All rights reserved.