RT info:eu-repo/semantics/article
T1 Post-welding high temperature aging and localized corrosion in welding zones of A286 RSW joints
A1 Martín Llorente, Óscar
A1 Tiedra Frontaura, María del Pilar
K1 Resistance spot welding
K1 A286 superalloy
K1 Aging treatment
K1 Electrochemical minicell
K1 Localized corrosion
K1 3316.14 Soldaduras
AB Small-scale single and double loop electrochemical potentiokinetic reactivation (EPR and DLEPR) with an electrochemical minicell were used to study the effect of post-welding high temperature aging treatment (there were six different aging treatments performed at the same aging temperature of 840°C for six different aging times of 0.5 h, 1, 25, 50, 100 and 200 h) on localized corrosion of small-sized welding zones of A286 resistance spot welding (RSW) joints, where welding parameters were welding time (0.36 s), welding current (6 kA) and electrode force (2300 N). Results obtained from EPR and DLEPR and from scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) mapping showed that: (i) the maximum localised corrosion is reached at the aging time from which η phase, whose precipitation gives rise to Cr-depleted zones, is observable (0.5 h for base metal (BM) and 10 h for fusion zone (FZ)); (ii) segregation that occurs in FZ causes the zones adjacent to interdendritic regions to become Cr-depleted zones; (iii) Widmanstätten precipitation mode emergence leads to higher levels of localized corrosion; (iv) grain growth occurs in heat affected zone (HAZ) with respect to BM and, thus, localized corrosion is different in both zones.
PB SAGE Publications
SN 1478-422X
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/77395
UL https://uvadoc.uva.es/handle/10324/77395
LA eng
NO Corrosion Engineering, Science and Technology Volume 60, Issue 6, September 2025, Pages 512-529
NO Producción Científica
DS UVaDOC
RD 05-sep-2025