“…But the characterization and causes about the pores inside parts are rarely to be analyzed and demonstrated. Wang [14] carried out a laser shaping experiment in which pre-stretched 7050 alloy plates are repaired using AlSi12 powder, the defects at the bonding interface of substrate and cladding layer are analyzed, without deeper study on the defects inside the cladding layers. Xue [15] used AlSi12 powder to repair ZL104 plates with prefabricated gap utilizing laser forming technique; A laser deposition repair experiment are accomplished by Qin on ZL114A casted substrates using ZL104 powder [16].…”