Mechanical properties of friction stir welded aluminum alloy with butt and lap cases

Abstract EN

Mechanical properties were investigated in base and friction stir linear welds of 7075 aluminum alloy.

Welding tools consist of a shoulder with a pin and with-out pin.

This work addresses the effects of tool geometry on tensile stress and shear strength of butt and lap welds, and comparing with base material.

Also, the effects of process condition on the strength of friction stir processed material are quantitatively characterized.

Compared to the butt case, the friction stir lap linear welds, with pin, leads to a 20 % increase in optimized weld strength with 1000 rpm of tool revolutions and 200 mm / min of tool speed.

The optimizing of operating conditions primarily leads to a 15 % increase in optimized weld shear strength, with 1000 rpm of tool revolutions and 200 mm / min of tool speed.