The heat treatment effects on the microstructure, hardness, and sigma phase content of L-PBF SAE 316L stainless steel
This research aims to enhance the understanding of the interrelationships among the manufacturing process, microstructure, and mechanical properties in the Laser Powder Bed Fusion (L-PBF) of SAE 316L stainless steel (SS), which can lead to the appearance of undesirable phases, like sigma...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academia.edu Journals
2024-05-01
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| Series: | Academia Materials Science |
| Online Access: | https://www.academia.edu/120249139/The_Heat_Treatment_Effects_on_the_Microstructure_Hardness_and_Sigma_Phase_Content_of_L_PBF_SAE_316L_Stainless_Steel |
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| Summary: | This research aims to enhance the understanding of the interrelationships among the manufacturing process, microstructure, and mechanical properties in the Laser Powder Bed Fusion (L-PBF) of SAE 316L stainless steel (SS), which can lead to the appearance of undesirable phases, like sigma (σ). As part of this investigation, as-built samples underwent solubilization heat treatment (HT), primarily targeting the dissolution of the σ phase and microstructure homogenization, with a subsequent assessment of its impact on hardness. The study reveals the efficacy of HT in reducing σ phase content, particularly following treatments at 950°C and 1,050°C for 2 h. Notably, the dissolution of the process-induced microstructure becomes progressively significant within the temperature range of 800–950°C for 2 h. Furthermore, the study identifies a hardening effect associated with the process-induced microstructure on the samples. Remarkably, the sample exhibiting the highest hardness value featured a substantial σ phase content and maintained the process-induced structure after HT. |
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| ISSN: | 2997-2027 |