Effect of molybdenum addition on aluminum welding

Welding aluminum is very important in engineering, particularly in the aircraft and automobile industries. Its recommended properties such as thermal conductivity which is a high value, the coefficient of thermal expansion which also has a high value, hydrogen high solubility, oxide coating e.g., High strength-to-weight ratio, electrical conductivity, and all these properties have a high ratio for aluminum alloys. On the other side, aluminum has some properties that affect its mechanical behavior, for example, surface finish, tear resistance, mechanical strength, and thermal resistance. Therefore, adding rare materials with specific amounts in the casting process before the solidification is a powerful technique used to enhance these characteristics by adding these rare materials that are useful for affecting the welding properties and defects problems. Al-Ti is commercially available with Al-15% Ti. This paper investigates the effect of Molybdenum, Mo, in addition to pure aluminum which is commercially available and refined by Titanium and Boron on its weldability. The obtained results are presented and discussed.