Effect of a magnetic field applied during fusion welding on the fatigue damage of 2205 duplex stainless steel joints

•Magnetic field applied during welding of 2205 duplex steel improved fatigue resistance.•Magnetic field induced ferrite grain refinement, high regenerated austenite in the HAZ.•Improved microstructure increased number of microstructure barriers for crack growth.•Crack initiation needed more load cyc...

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Bibliographic Details
Published in:International journal of fatigue 2019-04, Vol.121, p.243-251
Main Authors: Rosado-Carrasco, J., Krupp, U., López-Morelos, V.H., Giertler, A., García-Rentería, M.A., González-Sánchez, J.
Format: Article
Language:English
Subjects:
Crack propagation
Duplex stainless steel
Duplex stainless steels
Electromagnetic fields
Fatigue cracks
Fatigue damage
Fatigue failure
Fracture mechanics
Fusion welding
Gas metal arc welding
Grain refinement
Heat affected zone
High cycle fatigue
Low intensity electromagnetic field
Materials fatigue
Metal fatigue
Microstructure
Microstructure evolution
Nucleation
Stainless steel
Weld metal
Welded joints
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Summary:•Magnetic field applied during welding of 2205 duplex steel improved fatigue resistance.•Magnetic field induced ferrite grain refinement, high regenerated austenite in the HAZ.•Improved microstructure increased number of microstructure barriers for crack growth.•Crack initiation needed more load cycles on samples welded under 3 mT magnetic field.•More plastic deformation was induced on austenite before fatigue crack initiation. The effect of the application of a 3 mT electromagnetic field (EMF) during the welding of a 2205 duplex stainless steel on the resistance to fatigue damage was investigated on samples subjected to high cycle fatigue (HCF) and very high cycle fatigue (VHCF) conditions. Ferrite grain refinement, high volume fraction of regenerated austenite in the heat affected zone and smaller columnar grains in the weld metal were induced by (EMF) application during gas metal arc welding. The improved microstructure evolution during the thermal cycle increased the number of microstructural barriers, hindering the nucleation and growth of microstructurally short fatigue cracks.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2018.12.022