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Abstract
In recent years, with the development of welding methods, using these methods in manufacturing industry and in advanced engineering has become more popular. In this study, mechanical properties of rods obtained by friction welding and electric arc welding are compared. Hence, three specimens with different material properties are manufactured, two of which are welded by friction welding and one of which is welded by electric arc welding. These three specimens are adapted to the ASTM E8-04 standard with the help of a universal lathe. Moreover, the tensile stress values and the elasticity modulus of all these specimens are obtained as a result of tensile tests. Accordingly, the effects of the type of welding and material properties used in manufacturing on the mechanical behavior of the specimens are examined. In addition, specimens taken from the cracked surfaces of the pieces broken from the specimens as a result of the tensile test are examined with SEM (scanning electron microscopy). These examinations reveal the microstructure of the specimens. The elemental distribution data obtained as a result of examinations with SEM and the mechanical property data obtained as a result of tensile tests support each other. Furthermore, effects of a heat affected zone (HAZ) on the mechanical properties of the rod are investigated as a functionally graded material.
Highlights
Due to its ease of use, electric arc welding has a wide range of applications in the manufacturing industry
The elemental distribution data obtained as a result of examinations with scanning electron microscopy (SEM) and the mechanical property data obtained as a result of tensile tests support each other
Since the welding is a process performed at high temperatures, the mechanical properties of the structure from which the welding is made are affected by this process
Summary
Due to its ease of use, electric arc welding has a wide range of applications in the manufacturing industry. Material properties in electric arc welding are affected by high temperature. The structure turns out from indicating ductile material properties and starts indicating brittle material properties. The material feature of the welded structure after cooling down to room temperature depends on which temperature it starts to cool. The higher the temperature at which this structure begins to cool, the more brittle a material property it will have. Since the welding is a process performed at high temperatures, the mechanical properties of the structure from which the welding is made are affected by this process. The high temperature formed during the welding process affects both the welding point and the neighbors of that point
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