Effects of Nb and Mo on the microstructure and properties of 420 stainless steel processed by laser-powder bed fusion

Subrata Deb Nath, Emma Clinning,Gautam Gupta, Vincent Wuelfrath-Poirier,Gilles L’Espérance,Ozkan Gulsoy,Martin Kearns,Sundar V. Atre

Additive Manufacturing（2019）

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摘要

•Addition of Nb and Mo improved the UTS and elongation of L-PBF 420 stainless steel.•Nanoscale NbC precipitated in the presence of Nb and Mo.•Tempering of martensites and NbC correlated with improved mechanical properties.•Mechanical and corrosion properties of L-PBF specimens were superior to wrought 420 stainless steel.

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关键词

Laser-powder bed fusion,420 Stainless steel,Niobium,Tensile strength,Microstructure

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