Friction Hydro-Pillar Processing and Tungsten Inert Gas Welding of a Duplex Stainless Steel

• Published in: Materials science and technology Vol. 35; no. 10; pp. 1161 - 1172
• Main Authors: Lessa, Cleber Rodrigo de Lima, Martinazzi, Douglas, Figueiredo, Arlan Pacheco, Lemos, Guilherme Vieira Braga, Reguly, Afonso
• Format: Journal Article
• Language: English
• Published: London, England Taylor & Francis 03.07.2019; SAGE Publications
• Subjects: duplex stainless steel; friction hydro pillar processing; phases; SAF 2205; tungsten inert gas; tungsten inert gas; SAF 2205; friction hydro pillar processing; duplex stainless steel; phases
• ISSN: 0267-0836; 1743-2847
• DOI: 10.1080/02670836.2019.1613801

This work presents friction hydro-pillar processing (FHPP) and tungsten inert gas (TIG) welding of SAF2205 duplex stainless steel. Weld microstructural and mechanical characterisation were carried out based on the standards (DNV-RP-F112 and DNV-OS-F101). Therefore, optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were used. In addition, mechanical properties were evaluated by microhardness measurements. Furthermore, the joining processes were thermodynamically simulated for confirmation of the expected phases in each welding method. It was possible to verify the phases developed after the experimental welding (FHPP and TIG) as well as the ones obtained in the thermodynamic analyses. Finally, it was noted that FHPP promoted mechanical and metallurgical features requested by the standards.