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Fatigue behavior of dissimilar ultrasonic welds in lap-shear specimens in magnesium and steel sheets is investigated. The welds were produced using a Sonobond ultrasonic spot welder to join magnesium AZ31B-H24 to two types of steel. The lap-shear specimens have been machined into a dog-bone profile to approximate a linear weld. The lap-shear linear welds were studied based on experimental observations,...
These experiments were done to evaluate the feasibility of locally modifying the surface properties of magnesium alloys with friction-stir processing. The magnesium alloy used for the study was high-pressure die-cast AM60B, nominally Mg−6Al−0.13 Mn (wt.%). Friction-stir passes were made with a translation speed of 1.7 mm/s using tool-rotation speeds of 1,250 rpm or 2,500 rpm. Stir passes with good...
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