Effect of heat sources on microstructure and properties of duplex stainless steels fabricated by additive manufacturing

Zhang, Di; Liu, Aobo; Yin, Bangzhao; Wen, Peng

doi:10.1117/12.2601291

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Heterogeneous Microstructure1

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2023

2024

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“…During the temperature range of 1200-800°C, some ferrite grains transformed to primary austenite. The amount of primary austenite largely relied on the dwell time in such a temperature range and increased with increasing the dwell time [27,28].…”

Section: Heterogeneous Microstructurementioning

confidence: 99%

Microstructure, mechanical and electrochemical properties of wire-arc additively manufactured duplex stainless steel

Liu

Yin

Zhang

et al. 2023

Science and Technology of Welding and Joining

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Wire-arc additively manufactured (WAAM) super duplex stainless steels (DSS) 2594 walls were fabricated to investigate the microstructure of different regions, including top, body and root as well as the influence of microstructure on mechanical and electrochemical properties. The microstructure was composed of ferrite and austenite with a few nitride precipitates. The ferrite content decreased from top to root. The average hardness increased slightly from top to root. The ultimate tensile strength of different regions varied slightly, comparable to that of the hotrolled plate. Compared with those in vertical direction, samples in the horizontal direction had higher strength and lower elongation. The corrosion resistance ranked as root ≈ body > hotrolled > top.

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Section: Heterogeneous Microstructurementioning

confidence: 99%