Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel
Maraging steels are high-strength steels that are hardened by the formation of precipitates during an isothermal aging heat treatment. Depending on the aging temperature and time the cooling rate after holding can play a significant factor on the development of the microstructure and mechanical prop...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/4/538 |
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| author | Stefan Zeisl Ronald Schnitzer |
| author_facet | Stefan Zeisl Ronald Schnitzer |
| author_sort | Stefan Zeisl |
| collection | DOAJ |
| description | Maraging steels are high-strength steels that are hardened by the formation of precipitates during an isothermal aging heat treatment. Depending on the aging temperature and time the cooling rate after holding can play a significant factor on the development of the microstructure and mechanical properties. This study seeks to show how the cooling time influences the precipitation hardening effect, austenite reversion and the development of hardness and impact toughness. The material was aged at a constant temperature using holding times of 0 h, 4 h and 15 h and cooled with different cooling rates resulting in cooling times of 7 h, 28 h and 56 h. The microstructure was characterized using a combination of electron backscatter diffraction, X-ray diffraction and atom probe tomography with cluster-based precipitate analysis. It is shown that the effect of the cooling time is strongly dependent on the holding time and that a longer cooling time can improve hardness and impact toughness. |
| first_indexed | 2024-03-09T04:25:03Z |
| format | Article |
| id | doaj.art-997cf90dd35042fd9a118ac4ff45b17f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T04:25:03Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-997cf90dd35042fd9a118ac4ff45b17f2023-12-03T13:42:03ZengMDPI AGMetals2075-47012022-03-0112453810.3390/met12040538Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging SteelStefan Zeisl0Ronald Schnitzer1Department of Materials Science, Montanuniversität Leoben, Franz-Josef Straße 18, 8700 Leoben, AustriaDepartment of Materials Science, Montanuniversität Leoben, Franz-Josef Straße 18, 8700 Leoben, AustriaMaraging steels are high-strength steels that are hardened by the formation of precipitates during an isothermal aging heat treatment. Depending on the aging temperature and time the cooling rate after holding can play a significant factor on the development of the microstructure and mechanical properties. This study seeks to show how the cooling time influences the precipitation hardening effect, austenite reversion and the development of hardness and impact toughness. The material was aged at a constant temperature using holding times of 0 h, 4 h and 15 h and cooled with different cooling rates resulting in cooling times of 7 h, 28 h and 56 h. The microstructure was characterized using a combination of electron backscatter diffraction, X-ray diffraction and atom probe tomography with cluster-based precipitate analysis. It is shown that the effect of the cooling time is strongly dependent on the holding time and that a longer cooling time can improve hardness and impact toughness.https://www.mdpi.com/2075-4701/12/4/538maraging steelsatom probe tomographyheat treatment studyX-ray diffractionintermetallic precipitates |
| spellingShingle | Stefan Zeisl Ronald Schnitzer Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel Metals maraging steels atom probe tomography heat treatment study X-ray diffraction intermetallic precipitates |
| title | Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel |
| title_full | Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel |
| title_fullStr | Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel |
| title_full_unstemmed | Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel |
| title_short | Cooling Rate Controlled Aging of a Co-Free Fe-Ni-Cr-Mo-Ti-Al Maraging Steel |
| title_sort | cooling rate controlled aging of a co free fe ni cr mo ti al maraging steel |
| topic | maraging steels atom probe tomography heat treatment study X-ray diffraction intermetallic precipitates |
| url | https://www.mdpi.com/2075-4701/12/4/538 |
| work_keys_str_mv | AT stefanzeisl coolingratecontrolledagingofacofreefenicrmotialmaragingsteel AT ronaldschnitzer coolingratecontrolledagingofacofreefenicrmotialmaragingsteel |