Duplex stainless steels (DSS) are alloys with biphasic structure (austenite and ferrite) widely used in chemical and petrochemical fields thanks to their good mechanical properties and corrosion resistance. During welding, the precipitation of carbides, nitrides and other secondary phases can occur with detrimental effects on their characteristics. In this work the mechanical properties of a UNS S31803 (1.4462) steel welded joint, after solution treatment at 1050°C for 600 s, were analyzed through instrumented indentation test FIMEC. The results show that FIMEC test is able to assess the quality of welded joints and the effects of post-welding heat treatments.
The FIMEC test to reveal the quality of duplex stainless steel UNS S31803 welded joints
Bonollo F.;Ferro P.
2020
Abstract
Duplex stainless steels (DSS) are alloys with biphasic structure (austenite and ferrite) widely used in chemical and petrochemical fields thanks to their good mechanical properties and corrosion resistance. During welding, the precipitation of carbides, nitrides and other secondary phases can occur with detrimental effects on their characteristics. In this work the mechanical properties of a UNS S31803 (1.4462) steel welded joint, after solution treatment at 1050°C for 600 s, were analyzed through instrumented indentation test FIMEC. The results show that FIMEC test is able to assess the quality of welded joints and the effects of post-welding heat treatments.
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