Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys
In the present work, we use an advanced EBSD method to analyze the two prominent types of martensite microstructures that are found in the binary Fe-Ni system, lath martensite (27.5 at.% Ni) and plate martensite (29.5 at.% Ni). We modify, document, and apply an analytical EBSD procedure, which was o...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/2/156 |
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| author | Pascal Thome Mike Schneider Victoria A. Yardley Eric J. Payton Gunther Eggeler |
| author_facet | Pascal Thome Mike Schneider Victoria A. Yardley Eric J. Payton Gunther Eggeler |
| author_sort | Pascal Thome |
| collection | DOAJ |
| description | In the present work, we use an advanced EBSD method to analyze the two prominent types of martensite microstructures that are found in the binary Fe-Ni system, lath martensite (27.5 at.% Ni) and plate martensite (29.5 at.% Ni). We modify, document, and apply an analytical EBSD procedure, which was originally proposed by Yardley and Payton, 2014. It analyzes the distributions of the three KSI-angles (ξ<sub>1</sub>, ξ<sub>2</sub>, and ξ<sub>3</sub>, KSI after Kurdjumov and Sachs), which describe small angular deviations between crystal planes in the unit cells of martensite and austenite—which are related through specific orientation relationships. The analysis of the angular distributions can be exploited to obtain high-resolution, color-coded micrographs of martensitic microstructures, which, for example, visualize the difference between lath and plate martensite and appreciate the microstructural features, like midribs in large plate martensite crystals. The differences between the two types of martensite also manifest themselves in different distributions of the KSI-angles (wider for lath and narrower for plate martensite). Finally, our experimental results prove that local distortions result in scatter, which is larger than the differences between the orientation relationships of Kurdjumov/Sachs, Nishiyama/Wassermann, and Greninger/Troiano. |
| first_indexed | 2024-03-09T22:15:15Z |
| format | Article |
| id | doaj.art-59bec57db8a64186b49cf9027668af99 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T22:15:15Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj.art-59bec57db8a64186b49cf9027668af992023-11-23T19:23:47ZengMDPI AGCrystals2073-43522022-01-0112215610.3390/cryst12020156Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni AlloysPascal Thome0Mike Schneider1Victoria A. Yardley2Eric J. Payton3Gunther Eggeler4Institute for Materials, Ruhr-University Bochum, Universitätsstr. 150, 44801 Bochum, GermanyInstitute for Materials, Ruhr-University Bochum, Universitätsstr. 150, 44801 Bochum, GermanyDepartment of Mechanical Engineering, South Kensington Campus, Imperial College London, London SW7 2BX, UKAir Force Research Laboratory, Materials and Manufacturing Directorate, Dayton, OH 45433, USAInstitute for Materials, Ruhr-University Bochum, Universitätsstr. 150, 44801 Bochum, GermanyIn the present work, we use an advanced EBSD method to analyze the two prominent types of martensite microstructures that are found in the binary Fe-Ni system, lath martensite (27.5 at.% Ni) and plate martensite (29.5 at.% Ni). We modify, document, and apply an analytical EBSD procedure, which was originally proposed by Yardley and Payton, 2014. It analyzes the distributions of the three KSI-angles (ξ<sub>1</sub>, ξ<sub>2</sub>, and ξ<sub>3</sub>, KSI after Kurdjumov and Sachs), which describe small angular deviations between crystal planes in the unit cells of martensite and austenite—which are related through specific orientation relationships. The analysis of the angular distributions can be exploited to obtain high-resolution, color-coded micrographs of martensitic microstructures, which, for example, visualize the difference between lath and plate martensite and appreciate the microstructural features, like midribs in large plate martensite crystals. The differences between the two types of martensite also manifest themselves in different distributions of the KSI-angles (wider for lath and narrower for plate martensite). Finally, our experimental results prove that local distortions result in scatter, which is larger than the differences between the orientation relationships of Kurdjumov/Sachs, Nishiyama/Wassermann, and Greninger/Troiano.https://www.mdpi.com/2073-4352/12/2/156Fe-Ni alloyslath and plate martensiteadvanced analytical EBSDorientation relationships |
| spellingShingle | Pascal Thome Mike Schneider Victoria A. Yardley Eric J. Payton Gunther Eggeler Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys Crystals Fe-Ni alloys lath and plate martensite advanced analytical EBSD orientation relationships |
| title | Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys |
| title_full | Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys |
| title_fullStr | Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys |
| title_full_unstemmed | Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys |
| title_short | Crystallographic Analysis of Plate and Lath Martensite in Fe-Ni Alloys |
| title_sort | crystallographic analysis of plate and lath martensite in fe ni alloys |
| topic | Fe-Ni alloys lath and plate martensite advanced analytical EBSD orientation relationships |
| url | https://www.mdpi.com/2073-4352/12/2/156 |
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