Effect of microtexturing characteristics on the perform-ance of laser welded aluminum alloy-CFRTP joints
The effect of laser texturing on the performance of aluminium alloy-CFRTP laser welded joints was studied and the strengthening mechanism of laser texturing was analyzed.The results showed that the laser surfi-sculpt could be used to build texturing on the surface of aluminium alloys to obtain well-formed and high performance aluminium alloy-CFRTP laser welded lap joints,and the joint achieved tightly embed-ding.With the increasing of the depth-width ratio of the laser texturing,the molten CFRTP in the texturing was changed from fully filled to partially filled,and the joint shear proper-ties showed a trend of first increasing and then decreased,and the joint failure mechanism was changed from hybrid fracture(adhesive failure + cohesive failure),CFRTP base material fracture to hybrid fracture.The joint performance reached its maximum when the depth-width ratio reached 1.2 to 1.6,at which point the fracture location was located in the CFRTP base material.The strengthening mechanisms of the alumini-um alloy-CFRTP joint by laser texturing were enhancing mech-anical embedding and the"nailing"effect of splashing.
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