E Miguel-Díaz

Instituto Tecnológico Superior de Xalapa

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Arturo García‐Bórquez

Instituto Politécnico Nacional

A. Jiménez

Instituto Politécnico Nacional

A. Torre

CEA Cadarache

Vı́ctor M. López-Hirata

Instituto Politécnico Nacional

Maribel L. Saucedo‐Muñoz

Instituto Politécnico Nacional

Ana María Paniagua-Mercado

Instituto Politécnico Nacional

C. Mejía‐García

Instituto Politécnico Nacional

Cooperative Institutions

Instituto Politécnico Nacional

Tecnológico Nacional de México

Tohoku University

University of Bayreuth

Tecnologie Avanzate (Italy)

Universidad Tecnológica de Querétaro

Clemson University

Seoul National University

National Institute of Advanced Industrial Science and Technology

Colorado State University

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CVN impact energy and fracture characteristics correlations with different oxide nanoparticles improving submerged arc welds

Materials Research Express (2021)

A. Jiménez Ana María Paniagua-Mercado Arturo García‐Bórquez A. Torre C. Mejía‐García

Abstract The main aim of this research is to correlate the toughness improvement with fracture features of tested Charpy V-Notch impact specimens obtained from submerged arc welds enriched by different oxide nanoparticles (TiO 2 , SiO 2 , Al 2 O 3 and Mn 2 O 3 ). Through Scanning Electron Microscopy (SEM) fractography, fracture features were determined, which are the shear fracture percent, the loading angle, as well as the diameter of dimples and the width of cleavage sheets at ductile and brittle fracture regions, respectively. It was observed an increase of the Charpy V-Notch impact energy with the decrease of loading angle and the average diameter of dimples, as well as with the increase of its shear fractures percents. Moreover, it was correlated the increase of Acicular Ferrite surface density with the decrease of width of cleavage sheets. Thus, the toughness of the submerged arc welds can be improved by adding TiO 2 , SiO 2 , Al 2 O 3 or Mn 2 O 3 nanoparticles.

Charpy impact test

Fractography

Acicular ferrite

Dimple

Brittleness

Cleavage (geology)

10.1088/2053-1591/abdaf2

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Citations (5)

Sio2 and Al2O3 nanoparticles effect on the microstructure and mechanical properties of the weld bead joining AISI 1025 steel plates

MRS Advances (2018)

A. Jiménez Ana María Paniagua-Mercado Arturo García‐Bórquez Vı́ctor M. López-Hirata A. Torre

Bead

10.1557/adv.2018.608

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Citations (4)

Improvement of the toughness and ductility of the weld beads by inducing growth of acicular ferrite with TiO₂-nanoparticles during submerged arc welding

Materials Research Express (2019)

A. Jiménez Ana María Paniagua-Mercado Vı́ctor M. López-Hirata Arturo García‐Bórquez A. Torre

This work was focused to relate the mechanical properties of weld beads with size and superficial density of the acicular ferrite (AF) needles changing by impregnating two different sizes of TiO2-nanoparticles at the bevel before the SAW process. Microstructure of weld metal with addition of TiO2-nanoparticles with 21 and 127 nm sizes, respectively, shows an increase of the density (61.3 and 75.4%) and length of AF needles formed (156.4 and 68.8%), in comparison to the weld metal without TiO2-nanoparticles, namely the WB-0. Moreover, chemical analyses at weld metal and inclusions of weld beads with TiO2-nanoparticles reveal and increase on their Ti contents respect to those in the WB-0. Tensile and yield strength of the weld bead fabricated with the smallest TiO2-nanoparticles diminished in comparison to other weld beads. Besides, it was found that the average Vickers microhardness of weld metal decreased by adding TiO2-nanoparticles. On the other hand, their Charpy V-notch toughness values were found to be 30.1 and 102.6% bigger respect to those of the WB-0, by adding TiO2-nanoparticles with 21 and 127 nm sizes, respectively. In general, it was found that by adding TiO2-nanoparticles before the SAW process, the density and dimensions of the AF needles increase, which could be associated with the improvement of toughness and ductility of weld beads.

Acicular ferrite

Acicular

Toughening

Ductility (Earth science)

10.1088/2053-1591/ab381c

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Citations (9)