Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels
Abstract Combined addition of interstitial-substitutional elements has been acknowledged to contribute to the increase in the strengths of steels. For further improvements in mechanical properties, their atomic-scale interaction mechanisms with dislocations are required to be examined. In this study...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-54852-w |
| _version_ | 1797274906336952320 |
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| author | Yasuhito Kawahara Shunya Kobatake Kenji Kaneko Taisuke Sasaki Tadakatsu Ohkubo Chikako Takushima Jun-ichi Hamada |
| author_facet | Yasuhito Kawahara Shunya Kobatake Kenji Kaneko Taisuke Sasaki Tadakatsu Ohkubo Chikako Takushima Jun-ichi Hamada |
| author_sort | Yasuhito Kawahara |
| collection | DOAJ |
| description | Abstract Combined addition of interstitial-substitutional elements has been acknowledged to contribute to the increase in the strengths of steels. For further improvements in mechanical properties, their atomic-scale interaction mechanisms with dislocations are required to be examined. In this study, both high-resolution transmission electron microscopy and atom-probe tomography were used to correlate interstitial-substitutional elements with dislocation characteristics in austenitic stainless steels. Three types of dislocation core structures are identified and associated with their strain fields as well as N and Cr atoms in the N-added steels. It is revealed that N atoms interact elastically with the dislocations, followed by the segregation of Cr atoms via the chemical interaction between N and Cr atoms. This insight significantly improves the understanding of the multiple alloying mechanism in metallic materials such as interstitial alloys and high-entropy alloys. |
| first_indexed | 2024-03-07T15:04:51Z |
| format | Article |
| id | doaj.art-fd09577dc36946c3abf564349a6bee3b |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:04:51Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-fd09577dc36946c3abf564349a6bee3b2024-03-05T18:57:00ZengNature PortfolioScientific Reports2045-23222024-02-011411910.1038/s41598-024-54852-wCombined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steelsYasuhito Kawahara0Shunya Kobatake1Kenji Kaneko2Taisuke Sasaki3Tadakatsu Ohkubo4Chikako Takushima5Jun-ichi Hamada6Department of Materials, Kyushu UniversityDepartment of Materials, Kyushu UniversityDepartment of Materials, Kyushu UniversityNational Institute for Materials ScienceNational Institute for Materials ScienceResearch & Development Center, Nippon Steel Stainless Steel CorporationResearch & Development Center, Nippon Steel Stainless Steel CorporationAbstract Combined addition of interstitial-substitutional elements has been acknowledged to contribute to the increase in the strengths of steels. For further improvements in mechanical properties, their atomic-scale interaction mechanisms with dislocations are required to be examined. In this study, both high-resolution transmission electron microscopy and atom-probe tomography were used to correlate interstitial-substitutional elements with dislocation characteristics in austenitic stainless steels. Three types of dislocation core structures are identified and associated with their strain fields as well as N and Cr atoms in the N-added steels. It is revealed that N atoms interact elastically with the dislocations, followed by the segregation of Cr atoms via the chemical interaction between N and Cr atoms. This insight significantly improves the understanding of the multiple alloying mechanism in metallic materials such as interstitial alloys and high-entropy alloys.https://doi.org/10.1038/s41598-024-54852-w |
| spellingShingle | Yasuhito Kawahara Shunya Kobatake Kenji Kaneko Taisuke Sasaki Tadakatsu Ohkubo Chikako Takushima Jun-ichi Hamada Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels Scientific Reports |
| title | Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels |
| title_full | Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels |
| title_fullStr | Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels |
| title_full_unstemmed | Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels |
| title_short | Combined effect of interstitial-substitutional elements on dislocation dynamics in nitrogen-added austenitic stainless steels |
| title_sort | combined effect of interstitial substitutional elements on dislocation dynamics in nitrogen added austenitic stainless steels |
| url | https://doi.org/10.1038/s41598-024-54852-w |
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