Friction stir lap welding process and joint properties of laser-textured 6061 aluminum alloy and PEEK
This study utilized laser texturing technology to treat the surface of aluminum alloy,achieving high-quality bonding with polyetheretherketone(PEEK) through friction-lap welding(FLW). Orthogonal experiments were used to study the effects of rotational speed,welding speed and applied pressure on the tensile shear performance of the joint,and the optimal process parameters were determined. And the connection mechanism were explained by observing the micro-morphology of the joint interface. The results indicate that the rotation speed has the most significant impact on the quality of the joint,followed by welding speed,while the effect of plunge depth is relatively minor. The optimal combination of process parameters is determined as follows:rotation speed of 1000 r/min,welding speed of 70 mm/min and plunge depth of 0.2 mm. Under these process parameters,the tensile-shear force and strength of the joint can reach 3749.10 N and 14.99 MPa,respectively. The joint fractures near the PEEK end,indicating that the laser-textured joint possesses good interfacial strengthening capabilities. Additionally,through microstructural analysis,the connection between 6061/PEEK is not only mechanically interlocked but also chemically bonded,forming new chemical bonds Al—O—C,which contributes to the enhancement of joint strength.
万方数据
维普
