Wahono Wahono, Ido Verla Sunday, Aminnudin Aminnudin, Redyarsa Dharma Bintara, Abu Saad Ansari, Yanuar Rohmat Aji Pradana
In this study, Nylon 6 and SS AISI 304 were joined using friction lap welding (FLW) by filling the pre-hole in SS AISI 304 plate. The shear property and fracture morphology were analyzed using both experimental and numerical approaches. The pre-hole prepared SS AISI 304 plate was placed at the top of the Nylon 6 plate and constantly clamped together during the FLW process under traverse speeds of 10, 30, 50 mm/min with hole row distances of 20 and 24 mm. Afterward, the shear strength test was conducted using the MTS based on AWS D8.9-97 standard. The macroscopic fracture surface images were also provided to confirm the shear test result. The heat input is strongly determined by the shear properties of the joint, where the higher traverse speed shifts the shear strength to the lower level. On the other hand, hole row distance indicates the distance between each row to the respective heat source; therefore, the closer distance induces higher shear strength. This heat input showed a remarkable effect on determining the shear strength of the FLW joint, along with the stress concentration generated around nylon pins during shear loading, as confirmed by the simulation results. These phenomena are further demonstrated by the fracture and peel surface of the FLW joint, where the joint formed by higher heat input showed a larger brittle fracture area at the pin and deeper cleavage because of material loss moving to SS plate top surface. The shear strength value was inversely proportional to ductility. © 2021 Author(s).
Department of Mechanical Engineering, Universitas Negeri Malang, Indonesia; Materials Science and Engineering, Incheon National University, South Korea
