Through weld for aluminum or aluminum alloy base metals by using high-density energy beams

A through weld method using applied to high energy beams, the method comprising the following steps:

• a positioning a first aluminum or aluminum alloy welding base metals opposite a source of the energy beams the first welding base metal having a first surface and a second surface opposite the first surface;
• a disposing step of disposing a second aluminum or aluminum alloy welding base metal beneath the first welding base metal, the second welding base metal having a first surface and a second surface opposite the first surface, wherein the second surface of the first welding base material directly abuts the first surface of the second welding base metal;
• and
• a supplying step of supplying a shield gas is form ambience over a submerged-scar projecting from a welding site defined on a second surface of the second welding base metal, as well as the shield gas to cool and push up a scar projection from the welding site on second surface of the second welding base metal, wherein a vertical height of a submerged scar is reduced.