Showing 4 results for Friction Welding
S. Sakiyan, H. Sabet, M. Abbasi ,
Volume 2, Issue 1 (8-2016)
Abstract
This Paper presents the welding parameter's effect (forging pressure, welding time) on macrostructure and mechanical properties of friction welding valve steel HNV3 to Nimonic 80A super alloy. For this purpose, two rods with 20 mm diameters are prepared and with using different parameters (Increase forging pressure and welding time) by friction welding method are welded together. Tensile Test carried out on samples for investigating the effect of a parameter. It was discovered that when the welding parameters used in connecting HNV3 and Nimonic 80A Superalloy couple through friction welding were selected correctly; strength of the connection would increase compared to the main material.
B. Sadeghian, A. Taherizadeh, M. Atapour, T Salehi, M Nosouhian,
Volume 3, Issue 1 (8-2017)
Abstract
Aluminum to stainless steel joints are broadly used in industries in order to reduce fuel consumption. While fusion welding is not a suitable method to join these metals. solid state welding, like friction welding (FW), is an effective way to this process. However, risk of intermetallic compounds (IMCs) formation is probable in these welds. In previews investigations formation of FeAl3, Fe2Al5 and Fe4Al13 is reported. In this study, effect of different parameters on generated heat and temperature distribution that lead to formation of these compounds in a FW of aluminum alloy to stainless steel is investigated using Finite Element Method (FEM). Additionally, a mathematical modeling of the parameters is performed using Artificial Neural Network (ANN) and the optimum level of the parameters has been found.
A. Etemadi, M. Kasiri-Asgarani, H. R. Bakhsheshi-Rad, M. Sadeghi Gogheri,
Volume 9, Issue 2 (1-2024)
Abstract
In this research, dissimilar joining of biodegradable AZ31 alloy to Ti-6Al-4V titanium alloy by rotary friction welding method was investigated with aim of preparation of pin or screw for orthopedic applications. optical and scanning electron microscope (sem) were used to investigate the microstructure, x-ray diffraction was conducted for phase analysis, torsion and micro-hardness tests were carried out to investigate mechanical properties, and polarization and electrochemical impedance spectroscopy were employed to evaluate corrosion resistance. in the welding procedure, rotational speed of 1100, 1200 and 1300 rpm and friction time of 2 and 4 seconds were considered as variable parameters, and two parameters of friction pressure and forge pressure were considered as constant parameters at 50 and 40 MPa, respectively. The microstructure of the joint zone showed that there is no deformation in the titanium alloy side. However, in the magnesium side, the greatest amount of deformation occurred with the distance from the joint line, where weld center zone (CZ), dynamic recrystallization zone (DRX), thermomechanical affected zone (TMAZ) and partial deformation zone (PDZ) are detected. The formation of intermetallic phases such as Mg2AlZn, Ti3Al and also the refining the grains size is the main reason for increasing the hardness of the magnesium side near the joint line up to 150 HV. The results of the torsion test showed that the welded sample has the highest shear strength of 81.51 MPa and also the highest corrosion resistance among other samples at a rotation speed of 1200 rpm and a friction time of 4 seconds.
Seyed Reza Elmi Hossaini, Seyed Ali Mousavi Mohammadi,
Volume 9, Issue 2 (8-2026)
Abstract
In this research, the influence of various forge pressure values and also the chemical composition of different carbon steels on rotary friction welding of SS 304 to carbon steels has been investigated. The steel rods of AISI 1015, 1030, and 1045 have been RFWed to SS 304 using 20, 40, and 80 bar forge pressure. Results indicated the 40-bar forge pressure as the optimum value, and by applying pressures below this number, the material flow in the weld interface would be tackled, resulting in improper mechanical values. By exceeding the optimum forge pressure, most of the viscoplastic material inside the weld interface would be rejected from that area in the form of flash, causing the weld to be done at a relatively low temperature. Microstructural investigation has been done by optical and scanning electron microscopes. Results showed that the weld zone is extremely fine due to DRX, and in the interface, a pro-eutectoid ferrite layer is formed, which has an increasing width when the heat input increases. By increasing the carbon content of carbon steels, their surface hardness increases, which induces higher heat inputs in constant welding parameters. Tensile test results showed that the optimum weld specimen is the RFW of AISI 1030 to SS 304 using 40 bar forge pressure, 40 bar friction pressure, 5s friction time, and 1500 RPM rotational speed. This specimen has shown 116 % joint efficiency and 715 MPa ultimate tensile strength.
