Abstract: A method for forming a weld includes providing a first metal part formed of a first material and a second metal part formed of a second material, the first material being a first metallic material, and the second material being a second metallic material. The method also includes providing a laser for emitting laser pulses, forming a first hole in the first metal part with a laser pulse defined by a pulse energy, the pulse energy being selected such that the first hole does not penetrate fully through the first metal part and pulsing the laser such that at least some of the first material is injected into the second metal part, and wherein the laser is able to emit laser pulses having pulse widths between 100 ps and 3000 ns.

Abstract: A weld (3) between a first material (1) and a second material (2), the first material (1) being a first metallic material, and the second material (2) being a second metallic material, the weld (3) has a width (4) between 0.5 mm and 7 mm, the weld (3) comprises at least one microweld (8), the microweld (8) forms a welding pattern (5) defined parallel to a surface (6) of the first material (1), and the microweld (8) has a characteristic feature size (7) of between 20 ?m and 400 um.

Abstract: A weld (3) between a first material (1) and a second material (2), the first material (1) being a first metallic material, and the second material (2) being a second metallic material, the weld (3) has a width (4) between 0.5 mm and 7 mm, the weld (3) comprises at least one microweld (8), the microweld (8) forms a welding pattern (5) defined parallel to a surface (6) of the first material (1), and the microweld (8) has a characteristic feature size (7) of between 20 ?m and 400 um.