2017
DOI: 10.1590/1980-5373-mr-2016-0506
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Microstructural Transformation in a Root Pass of Superduplex Stainless Steel Multipass Welding

Abstract: The microstructure of the root pass in a superduplex stainless steel multipass welding was investigated. Results showed that the welding metal has an austenite matrix with particles of sigma phase formed in the ferrite/austenite interface and intragranularly.Eventhough the filler metal is intended to keep the phase balance after welding,the welding metal presented a considerable decrease in the ferrite content and a high proportion of sigma phase. Despite the exposition to thermal cycles on every pass, the hea… Show more

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