Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature
Fine-grained austenitic stainless steels (FGSS) were plasma nitrided below 700 K to describe their microstructure evolution during the nitrogen supersaturation process and to investigate the post-stressing effect on the microstructure and mechanical properties of nitrided FGSS. Normal- and fine-grai...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Nitrogen |
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| Online Access: | https://www.mdpi.com/2504-3129/2/2/16 |
| _version_ | 1797534341119606784 |
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| author | Abdelrahman Farghali Tatsuhiko Aizawa Tomoaki Yoshino |
| author_facet | Abdelrahman Farghali Tatsuhiko Aizawa Tomoaki Yoshino |
| author_sort | Abdelrahman Farghali |
| collection | DOAJ |
| description | Fine-grained austenitic stainless steels (FGSS) were plasma nitrided below 700 K to describe their microstructure evolution during the nitrogen supersaturation process and to investigate the post-stressing effect on the microstructure and mechanical properties of nitrided FGSS. Normal- and fine-grained AISI304 plates were nitrided at 623 K and 673 K to investigate the grain size effect on the nitrogen supersaturation process as well as the microstructure evolution during the nitriding process. Fine-grained AISI316 (FGSS316) wires were nitrided at 623 K to demonstrate that their outer surfaces were uniformly nitrided to have the same two-phase, refined microstructure with high nitrogen solute content. This nitrided FGSS316 wire had a core structure where the original FGSS316 core matrix was bound by the nitrided FGSS316 layer. The nitrided wire had higher stiffness, ultimate strength, and elongation in the uniaxial tensile testing than its un-nitrided wires. The core microstructure was refined and homogenized by this applied loading together with an increase of nitrided layer hardness. |
| first_indexed | 2024-03-10T11:28:16Z |
| format | Article |
| id | doaj.art-ec40876c21b040d58feda8a04a09bffe |
| institution | Directory Open Access Journal |
| issn | 2504-3129 |
| language | English |
| last_indexed | 2024-03-10T11:28:16Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nitrogen |
| spelling | doaj.art-ec40876c21b040d58feda8a04a09bffe2023-11-21T19:29:09ZengMDPI AGNitrogen2504-31292021-05-012224425810.3390/nitrogen2020016Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low TemperatureAbdelrahman Farghali0Tatsuhiko Aizawa1Tomoaki Yoshino2Mechanical Engineering Department, Faculty of Engineering, Suez Canal University, Ismailia 41522, EgyptSurface Engineering Design Laboratory, Shibaura Institute of Technology, Tokyo 144-0045, JapanKomatsu-Seiki Kosakusho, Co., Ltd., Nagano 392-0022, JapanFine-grained austenitic stainless steels (FGSS) were plasma nitrided below 700 K to describe their microstructure evolution during the nitrogen supersaturation process and to investigate the post-stressing effect on the microstructure and mechanical properties of nitrided FGSS. Normal- and fine-grained AISI304 plates were nitrided at 623 K and 673 K to investigate the grain size effect on the nitrogen supersaturation process as well as the microstructure evolution during the nitriding process. Fine-grained AISI316 (FGSS316) wires were nitrided at 623 K to demonstrate that their outer surfaces were uniformly nitrided to have the same two-phase, refined microstructure with high nitrogen solute content. This nitrided FGSS316 wire had a core structure where the original FGSS316 core matrix was bound by the nitrided FGSS316 layer. The nitrided wire had higher stiffness, ultimate strength, and elongation in the uniaxial tensile testing than its un-nitrided wires. The core microstructure was refined and homogenized by this applied loading together with an increase of nitrided layer hardness.https://www.mdpi.com/2504-3129/2/2/16fine-grained austenitic stainless steelslow-temperature plasma nitridingstrengtheninghardeningbiomedical applications |
| spellingShingle | Abdelrahman Farghali Tatsuhiko Aizawa Tomoaki Yoshino Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature Nitrogen fine-grained austenitic stainless steels low-temperature plasma nitriding strengthening hardening biomedical applications |
| title | Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature |
| title_full | Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature |
| title_fullStr | Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature |
| title_full_unstemmed | Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature |
| title_short | Microstructure/Mechanical Characterization of Plasma Nitrided Fine-Grain Austenitic Stainless Steels in Low Temperature |
| title_sort | microstructure mechanical characterization of plasma nitrided fine grain austenitic stainless steels in low temperature |
| topic | fine-grained austenitic stainless steels low-temperature plasma nitriding strengthening hardening biomedical applications |
| url | https://www.mdpi.com/2504-3129/2/2/16 |
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