Author/Authors :
G. J. Hao، نويسنده , , Y. Zhang، نويسنده , , J. P. Lin، نويسنده , , Z. Lin، نويسنده , ,
Y. L. Wang، نويسنده , , G. L. Chen، نويسنده ,
Abstract :
An investigation was conducted to determine
the cause of weld cracking in laser Be/Al
weldments. In agreement with earlier studies, features
consistent with hot shortness cracking on the fracture
surfaces were observed. Closer examinations of the
fusion zone crack regions reveal that the cracking was a
result of thermal stress, shape of weld roots and
impurities segregation. The defects are related to the
weld parameters. The cracks easily nucleate at conduction
mode weld and blowholes easily appear at
keyhole mode weld.
