Please use this identifier to cite or link to this item: https://dspace.iiti.ac.in/handle/123456789/325
Title: Joining of 1050 aluminium alloy with 1018 low carbon steel by using gas metal ARC welding (GMAW) process
Authors: Pant, Dherendra Jay
Supervisors: Sabiruddin, Kazi
Keywords: Mechanical Engineering
Issue Date: 9-Aug-2016
Publisher: Department of Mechanical Engineering, IIT Indore
Series/Report no.: MT022
Abstract: Joining of aluminium and steel is often difficult because of large difference in thermo-physical properties of aluminium and iron. The solid solubility of iron in aluminium is almost zero (0.01%), which involves the easy formation of brittle intermetallic phases known as intermetallic compounds (IMC) at elevated temperatures which deteriorates the mechanical properties of the joints.The gas metal arc welding (GMAW) process is used to join 1050 aluminium alloy (5 mm thick) and 1018 low carbon steel (5 mm thick) samples with filler wires (Cu Al-10% Fe, Al-5% Si and Al-12% Si), at different welding parameters (such as voltage and wire feed rate) and different welding conditions (i.e. dry ad wet) in a butt joint configuration.Different amounts of silicon and copper are introduced into the weld through different filler wires. The effects of alloying elements on the microstructure of the weld and tensile strength of the resultant joint are investigated. Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS) are used to characterize the different welding zones of the samples. The microhardness values corresponding to different locations of the weld joint are evaluated using Vickers microhardness tester. Tensile test is also carried out to find the strength of weld joint by using universal testing machine (UTM).With the increase in silicon content in the weld, the thickness of intermetallic compound (IMC) decreases and the tensile strength of the joint increases. The thickness of the IMC layer could be controlled by Zn and Si-based filler wires. It is found that Cu Al-10% Fe filler wire not compatible with aluminium, Al-5% Si increases the number of blow holes and cracks by increasing voltage and Al-12% Si increases the heat affected zone (HAZ) in steel. 1050 Aluminium and 1018 low carbon steel are successfully joined by gas metal arc welding process. The ultimate tensile strength (UTS) of butt joints made in wet condition by using Al-5% Si and Al-12% Si filler wires are 45.2 MPa and 43.4 MPa respectively.
URI: https://dspace.iiti.ac.in/handle/123456789/325
Type of Material: Thesis_M.Tech
Appears in Collections:Department of Mechanical Engineering_ETD

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