Weld attributes like geometry and cooling rate are strong functions of the welding process parameters such as arc current, voltage and welding peed. A specific weld pool geometry can be produced using multiple sets of these welding variables, i.e., different combinations of arc current, oltage and welding speed. At present, there is no systematic methodology that can determine, in a realistic t...

Metals in particulate matter (PM) are considered a driving factor for many pathologies. Despite the hazards associated with particulate metals, personal exposures for at-risk workers are rarely assessed due to the cost and effort associated with monitoring. As a result, routine exposure assessments are performed for only a small fraction of the exposed workforce. The objective of this research ...

In this study, microalloyed steels were joined by using the submerged arc welding method at different welding currents of 350 A, 400 A and 450 A. The effects of selected welding parameters on the microstructure and mechanical properties of welded materials were investigated. Tensile tests and microhardness measurements were performed. Microstructural changes have been identified in the welding ...

1 Supported by the German Federal Ministry of Education and Research (bmb+f) Abstract The large problem to create manual welds of constant high quality results from missing optical information during the actual welding process. Due to the extreme brightness conditions in arc welding and the use of protective glasses, even experienced welders can hardly recognize details of the welding process a...

METAL transfer describes the process of the molten metal movement from the electrode tip to the workpiece in gas metal arc welding (GMAW). A better understanding of the metal transfer process is important for improvements in the quality and productivity of welding. While several distinct modes of the metal transfer have been classified,[1] the globular and spray transfer modes have received att...

Metal arc welding ranges from primitive (manual) to increasingly complex automated welding processes. Welding occupies 1% of the labour force in some industrialised countries and increasing knowledge of health risks, necessitating improved assessment strategies and controls have been identified by the International Institute of Welding (IIW), ILO, WHO and other authoritative bodies. Challenges ...