Cracking is a defect generated by a local rupture causing
discontinuities on the weld in the metal or on the adjacent
heat affected zone when freezing weld is solidified [10].
Cracking is considered one of the most serious defects of
welded joins, should be removed completely before putting
the product into use. Cracks may appear on the surface of the
weld, inside the weld and heat affected zone [10].