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      Influence of arc energy and filler metal composition on the microstructure in wire arc additive manufacturing of duplex stainless steels

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      Welding in the World
      Springer Science and Business Media LLC

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          Abstract

          The influence of arc energy and filler metal composition on the microstructure of additively welded thin-walled structures of duplex stainless steels was investigated using different commercially available standard and superduplex solid wire electrodes commonly used today. As welding process, the cold metal transfer (CMT) process was used. The arc energy and cooling rate were varied by adjusting the wire feed and welding speed. Optical emission spectroscopy (OES) and carrier gas melt extraction (CGME) were used to determine the chemical composition of the specimens. The ferrite content was determined both by magnetic induction and by image analysis as a function of the wall height. In addition, the microsections were examined for intermetallic phases and precipitations. Moreover, corrosion tests were carried out according to ASTM G 48, Method A. The results indicate that an increase in arc energy leads to longer t 12/8 cooling times. Depending on the filler metal composition, this leads to ferrite contents that are partially outside the values required according to ISO 17781. Furthermore, precipitates of secondary austenite are often found, which is attributed to the multiple reheating by the subsequent layers.

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          Microstructure and residual stress improvement in wire and arc additively manufactured parts through high-pressure rolling

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            Thermo-mechanical analysis of Wire and Arc Additive Layer Manufacturing process on large multi-layer parts

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              Material properties of CMT—metal additive manufactured duplex stainless steel blade-like geometries

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                Author and article information

                Contributors
                (View ORCID Profile)
                Journal
                Welding in the World
                Weld World
                Springer Science and Business Media LLC
                0043-2288
                1878-6669
                January 2021
                September 28 2020
                January 2021
                : 65
                : 1
                : 47-56
                Article
                10.1007/s40194-020-00995-z
                dcd918c3-cc56-4a15-b1ff-e5a2b9bbcf68
                © 2021

                https://creativecommons.org/licenses/by/4.0

                https://creativecommons.org/licenses/by/4.0

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