It is known that hydrogen is the main cause for porosity in Al-alloys while welding. The more the operator can narrow-down the melting range of the metal the easier it will be to weld the alloy. Used a 10 kW CO2 laser combined with TIG and MIG arcs to weld aluminum alloys.
It provides a basic understanding of the metallurgical principles involved showing how alloys achieve their strength and how the process of welding can affect these properties.
The heat is produced by an electric arc generated by the electrode and the materials. The heat is produced by an electric arc generated by the electrode and the materials. Aluminium has a high solubility of hydrogen in molten state but not in solid state which can easily cause pores during welding because the hydrogen is trying to escape before cooling. The properties of the wire must align with those of the particular alloy it is to be welded to.
