Corrosion of Duplex Stainless Steel Manufactured by Laser Powder Bed Fusion: A Critical Review

IF 2.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Sinica-English Letters Pub Date : 2024-03-08 DOI:10.1007/s40195-024-01679-z

Yiqi Zhou, Decheng Kong, Ruixue Li, Xing He, Chaofang Dong

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Abstract

Laser powder bed fusion (LPBF) is a commonly used additive manufacturing (AM) method for efficiently producing intricate geometric components. This investigation examines factors such as pores, cellular structure, grain size, and inclusions from the manufacturing process that contribute to the corrosion resistance of LPBF DSS. Furthermore, the as-built LPBF duplex stainless steel (DSS) is primarily ferrite due to the rapid cooling process. Therefore, the transformation of ferrite to austenite after various heat treatments in LPBF DSS and its corresponding corrosion resistance are presented. Additionally, a new mixed powder method is proposed to increase the austenite content in the as-built LPBF DSS. This review also focuses on the passivation capability and pitting corrosion performance in LPBF and conventional DSS. This article summarizes the variations in microstructure between as-built and heat-treated LPBF DSS, with their impacts on corrosion resistance, offering insights for manufacturing highly corrosion-resistant LPBF DSS.

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激光粉末床熔融技术制造的双相不锈钢的腐蚀：批判性评论

激光粉末床熔融（LPBF）是一种常用的增材制造（AM）方法，可有效生产复杂的几何部件。本研究探讨了孔隙、蜂窝结构、晶粒大小以及制造过程中产生的夹杂物等因素对 LPBF 双相不锈钢耐腐蚀性能的影响。此外，由于快速冷却过程，坯料 LPBF 双相不锈钢（DSS）主要是铁素体。因此，本文介绍了 LPBF DSS 经过各种热处理后铁素体向奥氏体的转变及其相应的耐腐蚀性能。此外，还提出了一种新的混合粉末方法，以增加坯料 LPBF DSS 中的奥氏体含量。本综述还重点介绍了 LPBF 和传统 DSS 的钝化能力和点蚀性能。本文总结了坯料和热处理 LPBF DSS 的微观结构变化及其对耐腐蚀性能的影响，为制造高耐腐蚀 LPBF DSS 提供了启示。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.