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The base metal used in this research was a 12.7 mm thick plate of UNS S32205 duplex stainless steel. The plate was solubilised at 1100 ºC and cooled in water to avoid the grain boundary precipitation of the sigma phase (sensitisation). The chemical composition is described in Table 1, along with the acceptance range according to ASTM A2403030 ASTM: American Society for Testing and Materials. ASTM A240: standard specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications. West Conshohocken: ASTM; 2004.. The combustion and fusion methods were used to determine the carbon and sulfur content using Leco analyser CS-300, according to ASTM E10193131 ASTM: American Society for Testing and Materials. ASTM E1019: standard test methods for determination of carbon, sulfur, nitrogen, and oxygen in steel, iron, nickel, and cobalt alloys by various combustion and fusion techniques. West Conshohocken: ASTM; 2011.. The X-ray emission spectrometric method was used for the other alloying elements determination using a Panalytical spectrometer PW2404, according to ASTM E5723232 ASTM: American Society for Testing and Materials. ASTM E572: standard test method for analysis of stainless and alloy steels by wavelength dispersive x-ray fluorescence title spectrometry. West Conshohocken: ASTM; 2013..
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