The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel
The effect of long-term ageing (1000, 2000, and 3000 h) at 475 °C on mechanical properties, microstructure, and substructure of CUSTOM 465<sup>®</sup> maraging stainless steel was studied. The additional precipitation of nanometric particles of η-Ni<sub>3</sub>Ti phase in par...
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MDPI AG
2022-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/10/1643 |
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| author | Vlastimil Vodárek Gabriela Rožnovská Zdeněk Kuboň Anastasia Volodarskaja Renáta Palupčíková |
| author_facet | Vlastimil Vodárek Gabriela Rožnovská Zdeněk Kuboň Anastasia Volodarskaja Renáta Palupčíková |
| author_sort | Vlastimil Vodárek |
| collection | DOAJ |
| description | The effect of long-term ageing (1000, 2000, and 3000 h) at 475 °C on mechanical properties, microstructure, and substructure of CUSTOM 465<sup>®</sup> maraging stainless steel was studied. The additional precipitation of nanometric particles of η-Ni<sub>3</sub>Ti phase in partly recovered lath martensite and decomposition of the BCC solid solution accompanied by the formation of nanometric Cr-rich α’particles were identified. The fraction of reverted austenite in the final microstructure gradually increased with time of ageing at 475 °C. Ageing resulted in a gradual slight decline (up to 10%) in yield strength, ultimate tensile strength, and hardness. On the other hand, for all ageing, dwells ductility and impact energy values remained almost unchanged. The reason for this phenomenon lies in the gradual increase in the fraction of reverted austenite during long-term ageing at 475 °C and at the same time in the sluggish kinetics of microstructural changes in lath martensite. No susceptibility to 475 °C embrittlement was proved. |
| first_indexed | 2024-03-09T19:48:06Z |
| format | Article |
| id | doaj.art-325761bd0b34488b928a560867a3f308 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T19:48:06Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-325761bd0b34488b928a560867a3f3082023-11-24T01:18:21ZengMDPI AGMetals2075-47012022-09-011210164310.3390/met12101643The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless SteelVlastimil Vodárek0Gabriela Rožnovská1Zdeněk Kuboň2Anastasia Volodarskaja3Renáta Palupčíková4Department of Materials Engineering and Recycling, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 708 30 Ostrava, Czech RepublicMaterial and Metallurgical Research, Ltd., Pohraniční 31, 706 02 Ostrava, Czech RepublicMaterial and Metallurgical Research, Ltd., Pohraniční 31, 706 02 Ostrava, Czech RepublicDepartment of Materials Engineering and Recycling, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 708 30 Ostrava, Czech RepublicDepartment of Materials Engineering and Recycling, Faculty of Materials Science and Technology, VSB-Technical University of Ostrava, 708 30 Ostrava, Czech RepublicThe effect of long-term ageing (1000, 2000, and 3000 h) at 475 °C on mechanical properties, microstructure, and substructure of CUSTOM 465<sup>®</sup> maraging stainless steel was studied. The additional precipitation of nanometric particles of η-Ni<sub>3</sub>Ti phase in partly recovered lath martensite and decomposition of the BCC solid solution accompanied by the formation of nanometric Cr-rich α’particles were identified. The fraction of reverted austenite in the final microstructure gradually increased with time of ageing at 475 °C. Ageing resulted in a gradual slight decline (up to 10%) in yield strength, ultimate tensile strength, and hardness. On the other hand, for all ageing, dwells ductility and impact energy values remained almost unchanged. The reason for this phenomenon lies in the gradual increase in the fraction of reverted austenite during long-term ageing at 475 °C and at the same time in the sluggish kinetics of microstructural changes in lath martensite. No susceptibility to 475 °C embrittlement was proved.https://www.mdpi.com/2075-4701/12/10/1643CUSTOM 465<sup>®</sup> stainless steelmechanical propertiesprecipitation processesη-Ni<sub>3</sub>Ti phaseCr-rich α’ phasereverted austenite |
| spellingShingle | Vlastimil Vodárek Gabriela Rožnovská Zdeněk Kuboň Anastasia Volodarskaja Renáta Palupčíková The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel Metals CUSTOM 465<sup>®</sup> stainless steel mechanical properties precipitation processes η-Ni<sub>3</sub>Ti phase Cr-rich α’ phase reverted austenite |
| title | The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel |
| title_full | The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel |
| title_fullStr | The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel |
| title_full_unstemmed | The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel |
| title_short | The Effect of Long-Term Ageing at 475 °C on Microstructure and Properties of a Precipitation Hardening MartensiticStainless Steel |
| title_sort | effect of long term ageing at 475 °c on microstructure and properties of a precipitation hardening martensiticstainless steel |
| topic | CUSTOM 465<sup>®</sup> stainless steel mechanical properties precipitation processes η-Ni<sub>3</sub>Ti phase Cr-rich α’ phase reverted austenite |
| url | https://www.mdpi.com/2075-4701/12/10/1643 |
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