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Impact, Flexural, and Hardness Properties of AISI 1018 Mild Steel Butt Joint Welded using Gas Metal Arc Welding (GMAW) under Various Welding Parameters

Norazean Shaari, Nor Shamimi Shaari

Abstract


Abstract

The effects of welding parameters such as welding current, voltage, and travel speed on the impact, flexural, and hardness properties of AISI 1018 mild steel using Gas Metal Arc Welding (GMAW) were investigated. In this research, specimen sizes of 500 mm x 10 mm x 10 mm and 5.5 mm x 10 mm x 10 mm were fabricated according to ASTM standards. In addition, a v-groove had been prepared at the edge of each specimen as it enables complete penetration with an ideal weld shape. Finally, these steels were welded using the GMAW process at different welding currents and voltage. Afterwards, all welded specimens, including base metals, were tested to determine their changes in mechanical properties using the Charpy impact test, Rockwell hardness test, and four-point bending test. From the analysis, as the welding current and voltage decreased, the welded specimens' toughness, flexural strength, and hardness were increased. The results show that a welding voltage of 20V and current of 90A gave the highest energy absorbed of 62.44kJ, Rockwell hardness of HRD58, and flexural strength of 11.98kN.


Keywords


: Gas Metal Arc Welding (GMAW), welding current, welding voltage, butt joint, mild steel

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References


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