The aim of the present study is evaluating the feasibility of Oxy Fuel Welding (OFW), using liquefied petroleum gas (LPG), for the joining of the glass fiber/polyetherimide composite and aluminum alloy 2024-T3, which combine the effectiveness of the joint and the low cost of operation. A statistical experimental design was performed to determine by OFW parameters, and the samples were welded and evaluated after Lap Shear Strength (LSS) loading as the planning response variable. For a better result of the joint strength, through the mechanical interlock between the laminate and the AA2024-T3, anodization process was performed. A maximum value of LSS with 6.20 MPa was obtained, with optimized values reaching 6.32 MPa. The results of mechanical resistance of the hybrid junction involving the anodized AA2024-T3 were doubled, being 13.80 MPa in relation to the maximum obtained from the joint without treatment, confirming the increase of the interaction between these two materials. This fact was confirmed by the roughness test and optical microscopy. After welding, the AA2024-T3 structure was converted into a new structure of equiaxed grains, from the recrystallization of the grains, the hardness value being reduced by approximately 24%. From the TGA and EDS analyses, there was no significant difference in the degradation temperature of the thermoplastic composite, confirming the efficacy of the process for hybrid joint AA2024-T3 and GF/PEI composite, and there is no indication of contaminant that could interfere with the quality of the weld.

本研究的目的是评估使用液化石油气（LPG）进行含氧燃料焊接（OFW）的可行性，以结合玻璃纤维/聚醚酰亚胺复合材料和2024-T3铝合金，这结合了焊接的有效性且运营成本低。进行统计实验设计以通过OFW参数确定，并在搭接剪切强度（LSS）加载作为计划响应变量后对样品进行焊接和评估。为了获得更好的接合强度，通过层压板和AA2024-T3之间的机械互锁，进行了阳极氧化工艺。获得的LSS最大值为6.20 MPa，优化值达到6.32 MPa。涉及阳极氧化的AA2024-T3的混合结的机械阻力结果翻了一番，为13。相对于未经处理的接头获得的最大压力为80 MPa，这证实了这两种材料之间相互作用的增加。粗糙度测试和光学显微镜证实了这一事实。焊接后，由于晶粒的再结晶，AA2024-T3结构转变为等轴晶粒的新结构，硬度值降低了约24％。根据TGA和EDS分析，热塑性复合材料的降解温度没有显着差异，证实了混合接头AA2024-T3和GF / PEI复合材料的工艺效率，并且没有迹象表明可能会干扰焊接质量。粗糙度测试和光学显微镜证实了这一事实。焊接后，由于晶粒的再结晶，AA2024-T3结构转变为等轴晶粒的新结构，硬度值降低了约24％。根据TGA和EDS分析，热塑性复合材料的降解温度没有显着差异，证实了混合接头AA2024-T3和GF / PEI复合材料的工艺效率，并且没有迹象表明可能会干扰焊接质量。粗糙度测试和光学显微镜证实了这一事实。焊接后，由于晶粒的再结晶，AA2024-T3结构转变为等轴晶粒的新结构，硬度值降低了约24％。根据TGA和EDS分析，热塑性复合材料的降解温度没有显着差异，证实了混合接头A2022-T3和GF / PEI复合材料的工艺效率，并且没有迹象表明可能会干扰焊接质量。