Journal ArticleDOI
Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds
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In this article, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of duplex stainless steels with and without nickel enhancement.Abstract:
The excellent combination of strength and corrosion resistance in duplex stainless steels (DSS) is due to their strict composition control and microstructural balance. The ferrite–austenite ratio is often upset in DSS weld metals owing to the rapid cooling rates associated with welding. To achieve the desired ferrite–austenite balance and hence properties, either the weld metal composition and/or the heat input is controlled. In the current work, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of DSS with and without nickel enhancement. Results show that (i) chemical composition has got a greater influence on the ferrite–austenite ratio than the cooling rate, (ii) and even EBW which is considered an immature process in welding of DSS, can be employed provided means of filler addition could be devised.read more
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Investigation of microstructure evolution, mechanical and corrosion properties of SAF 2507 super duplex stainless steel joints by keyhole plasma arc welding
TL;DR: In this paper , a keyhole plasma arc welding (PAW) of the super duplex stainless steel (SDSS) is used to achieve full-penetration joints of medium-thickness plates.
Journal ArticleDOI
Avaliação das propriedades mecânicas e da resistência à corrosão em soldas de reparo pelo processo GTAW no aço inoxidável superduplex UNS S32760
Guttemberg Chagas de Souza,Adriana Loureiro da Silva,Sérgio Souto Maior Tavares,Juan Manuel Pardal,Miguel Luiz Ribeiro Ferreira,Ismael Cardote Filho +5 more
TL;DR: O presente trabalho pretendeu caracterizar a microestrutura, propriedades mecânicas, teor de nitrogenio and a temperatura critica de pites (CPT) em determinadas regioes of uma junta soldada de AISD UNS S32760 efetuada atraves do processo GTAW with dois reparos sequenciais.
Influence of multiple welding cycles on microstructure and corrosion resistance of a super duplex stainless steel
TL;DR: Super duplex stainless steel (SDSS) has found a wide use in demanding applications such as offshore, chemical and petrochemical industries thanks to its excellent combination of mechanical properti...
Journal ArticleDOI
Effect of Heat Input on the Microstructure and Mechanical Properties of Local Dry Underwater Welded Duplex Stainless Steel
TL;DR: In this article , the effects of different heat inputs on mechanical characteristics and the microstructure of welded metals were investigated to investigate the effects on mechanical properties and microstructural properties.
Journal ArticleDOI
Corrosion Behavior of Metal Active Gas Welded Joints of a High-Strength Steel for Automotive Application
Mainã Portella Garcia,Mainã Portella Garcia,G. L. Mantovani,R. Vasant Kumar,Renato Altobelli Antunes +4 more
TL;DR: In this article, the corrosion behavior of metal active gas-welded joints of a high-strength steel with tensile yield strength of 900MPa was investigated using two different heat inputs.
References
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Duplex stainless steels : microstructure, properties and applications
TL;DR: In this paper, the authors present a non-destructive testing of welds for service experience, based on the application of service experience in metallurgy and metallurgical applications.