Characterization and Determination of Residual Stresses in Laminated Aluminum Alloy/Epoxy-TiO2 NPs Composites Using X-ray Technique
نویسندگان
1 College of Material Engineering, University of Babylon, Iraq
2 College of Material Engineering, University of Babylon, Iraq
3 College of Material Engineering, University of Babylon, Iraq
doi
10.22052/JNS.2025.04.029چکیده
The residual stresses within the laminated Aluminum metal alloy/epoxy-TiO2 NPs composites were investigated. Residual stresses play a significant role in the properties and performance of laminated metal alloys/epoxy composites coatings. In this paper, the structural (FE-SEM, XRD and EDS), mechanical (tensile strength) and residual stresses using X-ray technique studied for pure epoxy at different curing temperature (20, 50 and 75 °C) and epoxy reinforced with TiO2 NPs at different weight ratios (2, 4 and 6 wt. %) as coating materials deposited on Al alloy substrates using spin coating technique. The structural characterizations (FE-SEM and XRD) proved the homogeneous and uniform epoxy coatings with thickness about (240 μm). The obtained results revealed notable differences in residual stresses values depend on the curing temperature and the added TiO2 NPs content of the epoxy coatings. The pure epoxy coatings exhibited the higher residual stresses values, while the enhanced epoxy coatings with TiO2 NPs showed the lowest values. The epoxy coatings deposited at (25 °C) and at (2 wt. %) added TiO2 NPs recorded the highest tensile strength values. The results demonstrated that the adding of TiO2 NPs to the epoxy coatings enhance the final performance of the coatings. The deposition temperature effect demonstrated that the epoxy coatings cured at high temperatures (75 °C) exhibited high residual stresses values compared to the coatings cured at lower temperature (25 °C).
