Quantitative analysis of retained austenite in Nb added Fe-based alloy
Abstract The use of Pipelines for long-distance transportation of crude oil, natural gas and similar applications is increasing and has pivotal importance in recent times. High specific strength plays a crucial role in improving transport efficiency through increased pressure and improved laying eff...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-06-01
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| Series: | Applied Microscopy |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s42649-022-00074-1 |
| _version_ | 1811241238154706944 |
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| author | Kwang Kyu Ko Jin Ho Jang Saurabh Tiwari Hyo Ju Bae Hyo Kyung Sung Jung Gi Kim Jae Bok Seol |
| author_facet | Kwang Kyu Ko Jin Ho Jang Saurabh Tiwari Hyo Ju Bae Hyo Kyung Sung Jung Gi Kim Jae Bok Seol |
| author_sort | Kwang Kyu Ko |
| collection | DOAJ |
| description | Abstract The use of Pipelines for long-distance transportation of crude oil, natural gas and similar applications is increasing and has pivotal importance in recent times. High specific strength plays a crucial role in improving transport efficiency through increased pressure and improved laying efficiency through reduced diameter and weight of line pipes. TRIP-based high-strength and high-ductility alloys comprise a mixture of ferrite, bainite, and retained austenite that provide excellent mechanical properties such as dimensional stability, fatigue strength, and impact toughness. This study performs microstructure analysis using both Nital etching and LePera etching methods. At the time of Nital etching, it is difficult to distinctly observe second phase. However, using LePera etching conditions it is possible to distinctly measure the M/A phase and ferrite matrix. The fraction measurement was done using OM and SEM images which give similar results for the average volume fraction of the phases. Although it is possible to distinguish the M/A phase from the SEM image of the sample subjected to LePera etching. However, using Nital etching is nearly impossible. Nital etching is good at specific phase analysis than LePera etching when using SEM images. |
| first_indexed | 2024-04-12T13:32:35Z |
| format | Article |
| id | doaj.art-0c962d56f3244789aa0e363b260f5370 |
| institution | Directory Open Access Journal |
| issn | 2287-4445 |
| language | English |
| last_indexed | 2024-04-12T13:32:35Z |
| publishDate | 2022-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Applied Microscopy |
| spelling | doaj.art-0c962d56f3244789aa0e363b260f53702022-12-22T03:31:07ZengSpringerOpenApplied Microscopy2287-44452022-06-0152111010.1186/s42649-022-00074-1Quantitative analysis of retained austenite in Nb added Fe-based alloyKwang Kyu Ko0Jin Ho Jang1Saurabh Tiwari2Hyo Ju Bae3Hyo Kyung Sung4Jung Gi Kim5Jae Bok Seol6Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Department of Metallurgical and Materials Engineering, Gyeongsang National University (GNU)Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Department of Materials Engineering and Convergence Technology, Gyeongsang National University (GNU)Abstract The use of Pipelines for long-distance transportation of crude oil, natural gas and similar applications is increasing and has pivotal importance in recent times. High specific strength plays a crucial role in improving transport efficiency through increased pressure and improved laying efficiency through reduced diameter and weight of line pipes. TRIP-based high-strength and high-ductility alloys comprise a mixture of ferrite, bainite, and retained austenite that provide excellent mechanical properties such as dimensional stability, fatigue strength, and impact toughness. This study performs microstructure analysis using both Nital etching and LePera etching methods. At the time of Nital etching, it is difficult to distinctly observe second phase. However, using LePera etching conditions it is possible to distinctly measure the M/A phase and ferrite matrix. The fraction measurement was done using OM and SEM images which give similar results for the average volume fraction of the phases. Although it is possible to distinguish the M/A phase from the SEM image of the sample subjected to LePera etching. However, using Nital etching is nearly impossible. Nital etching is good at specific phase analysis than LePera etching when using SEM images.https://doi.org/10.1186/s42649-022-00074-1Retained austeniteLePera etchingNital etchingOptical microscopy |
| spellingShingle | Kwang Kyu Ko Jin Ho Jang Saurabh Tiwari Hyo Ju Bae Hyo Kyung Sung Jung Gi Kim Jae Bok Seol Quantitative analysis of retained austenite in Nb added Fe-based alloy Applied Microscopy Retained austenite LePera etching Nital etching Optical microscopy |
| title | Quantitative analysis of retained austenite in Nb added Fe-based alloy |
| title_full | Quantitative analysis of retained austenite in Nb added Fe-based alloy |
| title_fullStr | Quantitative analysis of retained austenite in Nb added Fe-based alloy |
| title_full_unstemmed | Quantitative analysis of retained austenite in Nb added Fe-based alloy |
| title_short | Quantitative analysis of retained austenite in Nb added Fe-based alloy |
| title_sort | quantitative analysis of retained austenite in nb added fe based alloy |
| topic | Retained austenite LePera etching Nital etching Optical microscopy |
| url | https://doi.org/10.1186/s42649-022-00074-1 |
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