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Normalizing Effect of Heat Treatment Processing on 17-4 PH Stainless Steel Manufactured by Powder Bed Fusion
Content Provider | MDPI |
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Author | Yeon, Si-Mo Yoon, Jongcheon Kim, Tae Bum Lee, Seung Ho Jun, Tea-Sung Son, Yong Choi, Kyunsuk |
Copyright Year | 2022 |
Description | Laser powder bed fusion (L-PBF)-processed 17-4 PH stainless steel (SS) generally exhibits a non-equilibrium microstructure consisting mostly of columnar δ-ferrite grains and a substantial fraction of retained austenite and martensite, contrary to 17-4 PH SS wrought with a fully martensite structure and coarse grains. Despite the different microstructures of L-PBF and wrought 17-4 PH SS, post-processing is typically performed using the conventional heat treatment method. The insufficient effect of the heat treatment on the L-PBF product produces a δ-ferrite phase in the microstructure. To obtain improved mechanical properties, the addition of a normalizing treatment to the conventional heat treatment after L-PBF in a nitrogen gas environment was investigated. The fully martensitic matrix developed by adding the normalizing treatment contained homogeneous Cu precipitates and exhibited a similar or improved strength and elongation to failure compared to the wrought SS. |
Starting Page | 704 |
e-ISSN | 20754701 |
DOI | 10.3390/met12050704 |
Journal | Metals |
Issue Number | 5 |
Volume Number | 12 |
Language | English |
Publisher | MDPI |
Publisher Date | 2022-04-20 |
Access Restriction | Open |
Subject Keyword | Metals Manufacturing Engineering 17-4 Ph Stainless Steel Selective Laser Melting Laser Powder Bed Fusion Heat Treatment Microstructure Mechanical Properties |
Content Type | Text |
Resource Type | Article |