Open AccessCVN impact energy and fracture characteristics correlations with different oxide nanoparticles improving submerged arc welds
Author(s) -
A. Jiménez,
Ana María Paniagua-Mercado,
Arturo GarcíaBórquez,
A. Torre,
C. Mejı́a-Garcı́a,
Víctor M. LópezHirata,
Maribel L. SaucedoMuñoz,
E Miguel-Díaz
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abdaf2
Subject(s) - charpy impact test , materials science , fractography , scanning electron microscope , composite material , acicular ferrite , dimple , brittleness , fracture toughness , shear (geology) , cleavage (geology) , nanoparticle , toughness , metallurgy , fracture (geology) , microstructure , nanotechnology , austenite , bainite
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.
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