Study on laser welding of Al composite

The effects of laser welding parameter on strength of welded joints were st udied. The mechanism for loss of joint strength was analyzed. It was pointe d out that an important factor affecting joint strength is the reaction bet ween matrix and reinforced phase. On the basis of this, the concept of crit ical Si activity alpha ([si]min) was proposed. Using appropriate welding pa rameters and Si activity, high quality laser welded joints in an aluminum m atrix composite SiCW/6061A1 can be successfully obtained.