Fracture of sustained tensile-loaded Sn-3.0Ag-0.5Cu solder alloy in NaCl solution

► The fracture mode is drastically changed under applied stress in NaCl solution. ► The time to fracture and critical stress for fracture decrease. ► Many cracks nucleate and propagate on the side surface of the specimen. ► The preferential dissolution of Ag and Cu ions is observed.