RT info:eu-repo/semantics/article
T1 Effect of Widmanstätten η phase on tensile shear strength of resistance spot welding joints of A286 superalloy
A1 Martín Llorente, Óscar
A1 Tiedra Frontaura, María del Pilar
A1 San Juan Blanco, Manuel
K1 Resistance spot welding
K1 A286 superalloy
K1 Post-weld aging treatment
K1 Widmanstätten η phase
K1 γ’ precipitates
K1 3310.05 Ingeniería de Procesos
AB This work aims to study the effect of Widmanstätten η phase on tensile shear strength (TSS) of resistance spot welding joints (RSW) of A286 superalloy subjected to post-weld high temperature aging treatment. The tensile shear test specimens were welded in the solution treated condition, and then subjected to six different post-weld aging treatments (at an aging temperature of 840 °C for six different aging times). The as-cast dendritic microstructure of the weld nugget and the austenite equiaxed-grain microstructure of the base metal have a different response to the post-weld high temperature aging treatment. Growth of Widmanstätten η phase in the weld nugget is faster than in the base metal. While in the base metal the Widmanstätten η phase precipitates into the grain, in the weld nugget precipitates at the interdendritic region because of the segregation of Ti towards the last-to-solidify interdendritic regions (studied by performing SEM/EDX analysis). Although the hardness increases with the presence of Widmanstätten η phase, the increase in hardness does not necessarily imply an increase in the experimental TSS.
PB EDP Sciences
SN 2271-3646
YR 2019
FD 2019
LK https://uvadoc.uva.es/handle/10324/74003
UL https://uvadoc.uva.es/handle/10324/74003
LA eng
NO Metallurgical Research and Technology, 2019, vol. 116, n.º 3,  Article Number 302
NO Producción Científica
DS UVaDOC
RD 29-ene-2025