Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel
The applicability of ferritic stainless steel is restricted due to its low weldability, and this can be attributed to the severe grain growth in the weld zone during the solidification of the weld pool and formation of fully ferritic structure. This study aims to investigate the weldability of 18 mm...
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| Format: | Article |
| Language: | English |
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The Netherlands Press
2020-09-01
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| Series: | Metallurgical & Materials Engineering |
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| Online Access: | https://metall-mater-eng.com/index.php/home/article/view/545 |
| _version_ | 1797970801914281984 |
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| author | Akash Doomra Sandeep Singh Sandhu Beant Singh |
| author_facet | Akash Doomra Sandeep Singh Sandhu Beant Singh |
| author_sort | Akash Doomra |
| collection | DOAJ |
| description | The applicability of ferritic stainless steel is restricted due to its low weldability, and this can be attributed to the severe grain growth in the weld zone during the solidification of the weld pool and formation of fully ferritic structure. This study aims to investigate the weldability of 18 mm thick AISI 409 ferritic stainless steel plates using an electron beam welding process without the use of filler metal. The joints were investigated for metallography characterization (microstructure, macrostructure, and microhardness) and mechanical behavior (tensile strength and impact toughness) in as-welded condition and after post-weld heat treatment at 550 ºC for 75 minutes. The weld zone exhibited large columnar grains in the direction perpendicular to the weld centerline and got refined after post-weld heat treatment. The ultimate tensile strength, yield strength, and microhardness of the weld zone were found higher than the base metal. The impact toughness of weld zone was found to be reduced by 45%, but the post-weld heat treatment improved the toughness by 40%. Results revealed that the electron beam welding process could be successfully employed for welding of AISI 409 ferritic stainless steel, which will increase its application range that requires thicker section of welded plates. Post-weld heat treatment was found to be advantageous for improving the microstructure and mechanical properties. |
| first_indexed | 2024-04-11T03:22:42Z |
| format | Article |
| id | doaj.art-94d338a7e9c14adf8324b9cdc9b92b83 |
| institution | Directory Open Access Journal |
| issn | 2217-8961 |
| language | English |
| last_indexed | 2024-04-11T03:22:42Z |
| publishDate | 2020-09-01 |
| publisher | The Netherlands Press |
| record_format | Article |
| series | Metallurgical & Materials Engineering |
| spelling | doaj.art-94d338a7e9c14adf8324b9cdc9b92b832023-01-02T08:38:46ZengThe Netherlands PressMetallurgical & Materials Engineering2217-89612020-09-0126327929210.30544/545545Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steelAkash Doomra0Sandeep Singh Sandhu1Beant Singh2Department of Mechanical Engineering, IK Gujral Punjab Technical University, Kapurthala (Punjab), IndiaDepartment of Mechanical Engineering, Quest Infosys Foundation Group of Institutions, Mohali (Punjab), IndiaDepartment of Mechanical Engineering, Universal Group of Institutions, Mohali (Punjab), IndiaThe applicability of ferritic stainless steel is restricted due to its low weldability, and this can be attributed to the severe grain growth in the weld zone during the solidification of the weld pool and formation of fully ferritic structure. This study aims to investigate the weldability of 18 mm thick AISI 409 ferritic stainless steel plates using an electron beam welding process without the use of filler metal. The joints were investigated for metallography characterization (microstructure, macrostructure, and microhardness) and mechanical behavior (tensile strength and impact toughness) in as-welded condition and after post-weld heat treatment at 550 ºC for 75 minutes. The weld zone exhibited large columnar grains in the direction perpendicular to the weld centerline and got refined after post-weld heat treatment. The ultimate tensile strength, yield strength, and microhardness of the weld zone were found higher than the base metal. The impact toughness of weld zone was found to be reduced by 45%, but the post-weld heat treatment improved the toughness by 40%. Results revealed that the electron beam welding process could be successfully employed for welding of AISI 409 ferritic stainless steel, which will increase its application range that requires thicker section of welded plates. Post-weld heat treatment was found to be advantageous for improving the microstructure and mechanical properties.https://metall-mater-eng.com/index.php/home/article/view/545aisi 409 ferritic stainless steelelectron beam weldingmechanical propertiesmicrostructure analysispost weld heat treatmentxrd; fractographs |
| spellingShingle | Akash Doomra Sandeep Singh Sandhu Beant Singh Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel Metallurgical & Materials Engineering aisi 409 ferritic stainless steel electron beam welding mechanical properties microstructure analysis post weld heat treatment xrd; fractographs |
| title | Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel |
| title_full | Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel |
| title_fullStr | Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel |
| title_full_unstemmed | Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel |
| title_short | Effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded AISI 409 ferritic steel |
| title_sort | effect of post weld heat treatment on metallurgical and mechanical properties of electron beam welded aisi 409 ferritic steel |
| topic | aisi 409 ferritic stainless steel electron beam welding mechanical properties microstructure analysis post weld heat treatment xrd; fractographs |
| url | https://metall-mater-eng.com/index.php/home/article/view/545 |
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