Wire arc additive manufacturing (WAAM) is advantageous for fabricating large-scale metallic components; however, a high geometric accuracy as that of other AM techniques cannot be achieved because the deposition process with large layer. This study focuses on WAAM based gas metal welding (GMAW). To clarify influence shielding used to protect molten during fabrication built part obtained via GMA...

Abstract The current research of narrow-gap gas metal arc welding (NG-GMAW) primarily focuses on improving the sidewall fusion and avoiding lack-of-fusion defect. However, high cost operation difficulty methods limit industrial application. In this study, small amount active gases CO 2 O were added into pure argon inert shielding to improve weld formation pulsed-current mild steel. Their effect...

ASTM A53 steel is medium carbon with 0.3% content and often used for pipe manufacturing. The purpose of this study was to determine the effect post heating temperature variation on bending metallography test weld joint using GMAW process. electrode ER-70S-6. Post variations are 250oC, 300oC 350oC. result showed that welding 350oC postheating produce smallest open defect value. microstructure pe...

Welding is a reliable and effective metal fabrication process which is widely used in industries. High heating at a one location during welding and further rapid cooling generates residual stress and distortion in the weld and base metal. In last few decades various research efforts have been directed towards the control of welding process parameter aiming at reducing residual stress and distor...

In recent years Gas Metal Arc Welding (GMAW) technology has expanded its functionalities in various areas which have further motivated usage several emerging manufacturing industries. There are issues and challenges associated with this technology, especially dissimilar metal welding (DMW). One of the predominant is selecting appropriate parameters influence efficiency technology. To explore mo...

This paper aims at the development of an advanced control technology for pulsed gas metal arc welding (GMAW) of titanium or other materials which require a highly stable metal transfer process. It is known that conventional pulsed GMAW achieves stable and repeatable spray transfer by using correct pulse parameters. Because the optimal pulse parameters depend on welding parameters such as wire f...