Abstract
Due to high joint efficiency, welding is widely used to join materials. Today, there are many types of welding procedures in different manufacturing industries. Among welding procedures, Gas Metal Arc Welding (GMAW) is a versatile process due to its high flexibility. In this process, arc voltage, welding current, and welding speed are the main variables which can strongly affect the mechanical properties of the weld metal. Based on the available literature, many research works have been conducted on the GMAW process but there is still little experimental research on impact energy of the weld metal specifically in medium-carbon steels. Impact energy of the weld metal is extremely important particulary for the structures subjected to impact loads. Hence, the present paper is conducted to reveal the effect of GMAW variables on impact energy of the weld metal in CK45 carbon steel. The results of this paper indicated that the heat input value and weld bead size in different welding conditions are main factors which affect the impact energy of the weld metal.
Highlights
INTRODUCTION1 as shipbuilding, aircraft, aerospace, building construction, pipeline system, and automotive industry [13]
Considering the above cases, this study focuses on effects of gas metal arc welding (GMAW) process parameters including welding current, arc voltage, and welding speed on impact energy of the weld metal in CK45 carbon steel
The Charpy impact energy of the weld metals varied from 89.21 J to 154.25 J with changing in parameters of GMAW process
Summary
INTRODUCTION1 as shipbuilding, aircraft, aerospace, building construction, pipeline system, and automotive industry [13]. Steels with carbon ranging from 0.4% to 0.6% are used for rails, railway wheels, and rail axles [15] Due to their high applications, it is important to know the behavior of medium-carbon steels during the welding process. Numerous metallic materials can be joined using various welding methods, including friction stir welding (FSW), friction stir spot welding (FSSW), ultrasonic welding (USW), gas tungsten arc welding (GTAW), laser beam welding (LBW), gas metal arc welding (GMAW), and arc stud welding (ASW) All of these methods have different advantages and disadvantages in terms of cost, appropriateness, labor, training, efficiency, time, temperature, and simplicity [2,3,4,5,6,7]. The GMAW is known as the Metal Inert Gas (MIG)
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