On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.%
The microstructure, deformation mechanisms, tensile properties and fracture micromechanisms of ultrahigh-interstitial austenitic Fe-22Cr-26Mn-1.3V-0.7C-1.2N (mass.%) steel were investigated in wide temperature interval. After conventional homogenization and solid-solution treatment, the steel posses...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/6/786 |
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| author | Elena Astafurova Sergey Astafurov Galina Maier Irina Tumbusova Eugene Melnikov Valentina Moskvina Marina Panchenko Kseniya Reunova Nina Galchenko |
| author_facet | Elena Astafurova Sergey Astafurov Galina Maier Irina Tumbusova Eugene Melnikov Valentina Moskvina Marina Panchenko Kseniya Reunova Nina Galchenko |
| author_sort | Elena Astafurova |
| collection | DOAJ |
| description | The microstructure, deformation mechanisms, tensile properties and fracture micromechanisms of ultrahigh-interstitial austenitic Fe-22Cr-26Mn-1.3V-0.7C-1.2N (mass.%) steel were investigated in wide temperature interval. After conventional homogenization and solid-solution treatment, the steel possesses complex hardening which includes grain boundary, solid-solution and dispersion strengthening. In the temperature interval of −60 to +60 °C, steel demonstrates striking temperature dependence of a yield strength which could be enhanced by the increase in solid-solution treatment temperature. The variation in test temperature does not change the dominating deformation mechanism of the steel, dislocation slip and insufficiently influences tensile elongation and fracture micromechanisms. The insignificant increase in the fraction of brittle cleavage-like component on the fracture surfaces of the specimens in low-temperature deformation regime is promoted by increase in planarity of dislocation arrangement and the gaining activity of mechanical twinning. In high-temperature range (200–300 °C) of deformation, a negative strain-rate dependence, serrations on the stress-strain diagrams and improved strain-hardening associated with a dynamic strain aging phenomenon have been observed. |
| first_indexed | 2024-03-10T19:12:03Z |
| format | Article |
| id | doaj.art-55baec536d864288ab3b8c502c4fd244 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T19:12:03Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-55baec536d864288ab3b8c502c4fd2442023-11-20T03:43:23ZengMDPI AGMetals2075-47012020-06-0110678610.3390/met10060786On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.%Elena Astafurova0Sergey Astafurov1Galina Maier2Irina Tumbusova3Eugene Melnikov4Valentina Moskvina5Marina Panchenko6Kseniya Reunova7Nina Galchenko8Institute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaInstitute of Strength Physics and Materials Science SB RAS, 2/4 Akademicheskii ave., 634055 Tomsk, RussiaThe microstructure, deformation mechanisms, tensile properties and fracture micromechanisms of ultrahigh-interstitial austenitic Fe-22Cr-26Mn-1.3V-0.7C-1.2N (mass.%) steel were investigated in wide temperature interval. After conventional homogenization and solid-solution treatment, the steel possesses complex hardening which includes grain boundary, solid-solution and dispersion strengthening. In the temperature interval of −60 to +60 °C, steel demonstrates striking temperature dependence of a yield strength which could be enhanced by the increase in solid-solution treatment temperature. The variation in test temperature does not change the dominating deformation mechanism of the steel, dislocation slip and insufficiently influences tensile elongation and fracture micromechanisms. The insignificant increase in the fraction of brittle cleavage-like component on the fracture surfaces of the specimens in low-temperature deformation regime is promoted by increase in planarity of dislocation arrangement and the gaining activity of mechanical twinning. In high-temperature range (200–300 °C) of deformation, a negative strain-rate dependence, serrations on the stress-strain diagrams and improved strain-hardening associated with a dynamic strain aging phenomenon have been observed.https://www.mdpi.com/2075-4701/10/6/786high-interstitial steelaustenitetwinningstrain agingdispersion strengtheningsolid-solution strengthening |
| spellingShingle | Elena Astafurova Sergey Astafurov Galina Maier Irina Tumbusova Eugene Melnikov Valentina Moskvina Marina Panchenko Kseniya Reunova Nina Galchenko On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% Metals high-interstitial steel austenite twinning strain aging dispersion strengthening solid-solution strengthening |
| title | On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% |
| title_full | On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% |
| title_fullStr | On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% |
| title_full_unstemmed | On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% |
| title_short | On Temperature Dependence of Microstructure, Deformation Mechanisms and Tensile Properties in Austenitic Cr-Mn Steel with Ultrahigh Interstitial Content C + N = 1.9 Mass.% |
| title_sort | on temperature dependence of microstructure deformation mechanisms and tensile properties in austenitic cr mn steel with ultrahigh interstitial content c n 1 9 mass |
| topic | high-interstitial steel austenite twinning strain aging dispersion strengthening solid-solution strengthening |
| url | https://www.mdpi.com/2075-4701/10/6/786 |
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