首页|Corrosion of Duplex Stainless Steel Manufactured by Laser Powder Bed Fusion:A Critical Review
Corrosion of Duplex Stainless Steel Manufactured by Laser Powder Bed Fusion:A Critical Review
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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,offer-ing insights for manufacturing highly corrosion-resistant LPBF DSS.
Laser powder bed fusionDuplex stainless steelMicrostructureHeat treatmentPassivationPitting corrosion
Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China
Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
National Natural Science Foundation of ChinaScience and Technology Fundamental Resources Investigation Program
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