A novel ultrasonic vibration enhanced friction stir welding (UVeFSW) process was employed to join the rolled 2195 aluminium-lithium alloy of 4 mm thickness. The effects of superimposing ultrasonic on the macro metallograph. microhardness and tensile properties of welded joints were compared and analyzed. The effect of process parameters on the weld formation and joint mechanical prope... https://homehardware4ues.shop/product-category/polyurethane/