Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder

Yiqi Zhou; Wenqian Wang; Lili Li; Shuoyang Wang; Zhiyuan Huang; Zequn Zhang; Decheng Kong; Feng Shang; Bowei Zhang; Xiaogang Li; Yu Yan; Dirk Engelberg; Chaofang Dong

doi:10.1016/j.corsci.2025.113025

Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder

Yiqi Zhou, Wenqian Wang, Lili Li, Shuoyang Wang, Zhiyuan Huang, Zequn Zhang, Decheng Kong, Feng Shang, Bowei Zhang, Xiaogang Li, Yu Yan, Dirk Engelberg, Chaofang Dong

Materials Engineering

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Abstract

Adding Ni alloy to duplex stainless steel (DSS) powder increased austenite content to ∼20 % in laser powder bed fusion (LPBF) 22Cr DSS for as-built conditions. Annealing at 1000 °C promoted austenite formation (>95 %), whereas higher temperatures reduced it to 75 % at 1200 °C. The as-built LPBF 22Cr DSS exhibited a critical pitting potential (Epit) of 0.85 VSCE, which dropped to 0.25 VSCE after 1000 °C annealing, however it rebounded to 0.40 VSCE at 1200 °C. Ni improved tensile properties without enhancing pitting resistance. These results reveal the interplay between microstructure and pitting corrosion behavior, guiding the design of LPBF DSS.

Original language	English
Article number	113025
Journal	Corrosion Science
Volume	253
Early online date	9 May 2025
DOIs	https://doi.org/10.1016/j.corsci.2025.113025
Publication status	E-pub ahead of print - 9 May 2025

Keywords

Laser powder bed fusion
Duplex stainless steel
Pitting corrosion
Microstructure
Mixed raw materials

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.corsci.2025.113025

Clean version Paper 2025 LPBF DuplexAccepted author manuscript, 12.6 MBLicence: CC BY

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Zhou, Y., Wang, W., Li, L., Wang, S., Huang, Z., Zhang, Z., Kong, D., Shang, F., Zhang, B., Li, X., Yan, Y., Engelberg, D., & Dong, C. (2025). Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder. Corrosion Science , 253, Article 113025. Advance online publication. https://doi.org/10.1016/j.corsci.2025.113025

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title = "Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder",

abstract = "Adding Ni alloy to duplex stainless steel (DSS) powder increased austenite content to ∼20 % in laser powder bed fusion (LPBF) 22Cr DSS for as-built conditions. Annealing at 1000 °C promoted austenite formation (>95 %), whereas higher temperatures reduced it to 75 % at 1200 °C. The as-built LPBF 22Cr DSS exhibited a critical pitting potential (Epit) of 0.85 VSCE, which dropped to 0.25 VSCE after 1000 °C annealing, however it rebounded to 0.40 VSCE at 1200 °C. Ni improved tensile properties without enhancing pitting resistance. These results reveal the interplay between microstructure and pitting corrosion behavior, guiding the design of LPBF DSS.",

keywords = "Laser powder bed fusion, Duplex stainless steel, Pitting corrosion, Microstructure, Mixed raw materials",

author = "Yiqi Zhou and Wenqian Wang and Lili Li and Shuoyang Wang and Zhiyuan Huang and Zequn Zhang and Decheng Kong and Feng Shang and Bowei Zhang and Xiaogang Li and Yu Yan and Dirk Engelberg and Chaofang Dong",

year = "2025",

month = may,

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doi = "10.1016/j.corsci.2025.113025",

language = "English",

volume = "253",

journal = "Corrosion Science ",

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TY - JOUR

T1 - Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder

AU - Zhou, Yiqi

AU - Wang, Wenqian

AU - Li, Lili

AU - Wang, Shuoyang

AU - Huang, Zhiyuan

AU - Zhang, Zequn

AU - Kong, Decheng

AU - Shang, Feng

AU - Zhang, Bowei

AU - Li, Xiaogang

AU - Yan, Yu

AU - Engelberg, Dirk

AU - Dong, Chaofang

PY - 2025/5/9

Y1 - 2025/5/9

N2 - Adding Ni alloy to duplex stainless steel (DSS) powder increased austenite content to ∼20 % in laser powder bed fusion (LPBF) 22Cr DSS for as-built conditions. Annealing at 1000 °C promoted austenite formation (>95 %), whereas higher temperatures reduced it to 75 % at 1200 °C. The as-built LPBF 22Cr DSS exhibited a critical pitting potential (Epit) of 0.85 VSCE, which dropped to 0.25 VSCE after 1000 °C annealing, however it rebounded to 0.40 VSCE at 1200 °C. Ni improved tensile properties without enhancing pitting resistance. These results reveal the interplay between microstructure and pitting corrosion behavior, guiding the design of LPBF DSS.

AB - Adding Ni alloy to duplex stainless steel (DSS) powder increased austenite content to ∼20 % in laser powder bed fusion (LPBF) 22Cr DSS for as-built conditions. Annealing at 1000 °C promoted austenite formation (>95 %), whereas higher temperatures reduced it to 75 % at 1200 °C. The as-built LPBF 22Cr DSS exhibited a critical pitting potential (Epit) of 0.85 VSCE, which dropped to 0.25 VSCE after 1000 °C annealing, however it rebounded to 0.40 VSCE at 1200 °C. Ni improved tensile properties without enhancing pitting resistance. These results reveal the interplay between microstructure and pitting corrosion behavior, guiding the design of LPBF DSS.

KW - Laser powder bed fusion

KW - Duplex stainless steel

KW - Pitting corrosion

KW - Microstructure

KW - Mixed raw materials

U2 - 10.1016/j.corsci.2025.113025

DO - 10.1016/j.corsci.2025.113025

M3 - Article

SN - 0010-938X

VL - 253

JO - Corrosion Science

JF - Corrosion Science

M1 - 113025

ER -

Microstructure and corrosion performance of laser powder bed fusion produced duplex stainless steel using Ni over-alloyed mixed powder

Abstract

Keywords

UN SDGs

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