Rotary friction welding properties of AA5083-H112/AA7075-T6 joints: Parameter and low temperature effect

This study presents experimental findings from rotary friction welding of AA5083-H112 and AA7075-T6, conducted at consistent 1700 rpm rotational speed with four time intervals. The focus was on exploring the welding parameters influence on joint properties, assessed through mechanical testing, metallography and hardness tests. Prolonged welding led to elevated temperatures, expanding the heat-affected zone, grain growth and microhardness at the interface. The temperatures effect on joint toughness was evaluated through Charpy impact testing at different temperatures, showing lower impact strength at −192 °C. Fracture surfaces exhibited increased micro voids and dimples as the temperatures decreased. The study highlighted a positive link between extended welding times and improved cryogenic impact strength and mechanical properties.