Microstructure Distribution in 17-4 PH Martensitic Steel Produced by Selective Laser Melting

Igor Vysotskiy,Sergey Malopheyev,Ivan Zuiko,Sergey Mironov,Rustam Kaibyshev

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE（2022）

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摘要

In this work, electron backscatter diffraction (EBSD) was applied to investigate the microstructure distribution within the selective-laser-melted 17-4 PH martensitic steel. The volume fraction of the δ-ferrite was found to decrease in the building direction. This effect was attributed to the decrease in the cooling rate, which promoted the δ-ferrite → austenite → α-martensite transformation sequence.

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关键词

ph martensitic steel,microstructure

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