Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel
The clarification of the type of the ferrite formed owing to the melting of the Al–Si coating into the weld metal plays a significant role in the improvement of the mechanical properties of the laser welded joint. The results obtained by optical microscope (OM) and scanning electron microscope (SEM)...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423004179 |
| _version_ | 1827978285203587072 |
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| author | Kai Ding Tianhai Wu Wufeng Dong Tianhan Hu Shun Li Ping Zhu Yu Sun Jiayi Zhou Hua Pan Yulai Gao |
| author_facet | Kai Ding Tianhai Wu Wufeng Dong Tianhan Hu Shun Li Ping Zhu Yu Sun Jiayi Zhou Hua Pan Yulai Gao |
| author_sort | Kai Ding |
| collection | DOAJ |
| description | The clarification of the type of the ferrite formed owing to the melting of the Al–Si coating into the weld metal plays a significant role in the improvement of the mechanical properties of the laser welded joint. The results obtained by optical microscope (OM) and scanning electron microscope (SEM) in the regions near the ferrite before and after thermal simulation clearly demonstrate the negligible change in microstructure morphology, even for the ferrite with the size around 2 μm. In addition, simulated by JMatPro software, it can be found that the content of the α-ferrite decreases with the increase of the cooling rate. Based on the ultra-high cooling rate during laser welding and negligible change in the morphology of the ferrite by decreasing the cooling rate, the type of the ferrite formed in the WM is clarified as the δ-ferrite, without the formation of α-ferrite. The differences in the formation condition between the δ-ferrite and α-ferrite can affect the control of their size, morphology and distribution. |
| first_indexed | 2024-04-09T21:18:28Z |
| format | Article |
| id | doaj.art-761c5e6f864f4122a95ab228a8f18712 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:18:28Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-761c5e6f864f4122a95ab228a8f187122023-03-28T06:48:59ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012358805891Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steelKai Ding0Tianhai Wu1Wufeng Dong2Tianhan Hu3Shun Li4Ping Zhu5Yu Sun6Jiayi Zhou7Hua Pan8Yulai Gao9State Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, PR China; Corresponding author.State Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China; Shanghai Engineering Research Center for Metal Parts Green Remanufacture, Shanghai 200444, PR China; Corresponding author.The clarification of the type of the ferrite formed owing to the melting of the Al–Si coating into the weld metal plays a significant role in the improvement of the mechanical properties of the laser welded joint. The results obtained by optical microscope (OM) and scanning electron microscope (SEM) in the regions near the ferrite before and after thermal simulation clearly demonstrate the negligible change in microstructure morphology, even for the ferrite with the size around 2 μm. In addition, simulated by JMatPro software, it can be found that the content of the α-ferrite decreases with the increase of the cooling rate. Based on the ultra-high cooling rate during laser welding and negligible change in the morphology of the ferrite by decreasing the cooling rate, the type of the ferrite formed in the WM is clarified as the δ-ferrite, without the formation of α-ferrite. The differences in the formation condition between the δ-ferrite and α-ferrite can affect the control of their size, morphology and distribution.http://www.sciencedirect.com/science/article/pii/S2238785423004179Ferrite clarificationIn-situ observationAl–Si coatingLaser weldingPress-hardened steelThermal simulation |
| spellingShingle | Kai Ding Tianhai Wu Wufeng Dong Tianhan Hu Shun Li Ping Zhu Yu Sun Jiayi Zhou Hua Pan Yulai Gao Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel Journal of Materials Research and Technology Ferrite clarification In-situ observation Al–Si coating Laser welding Press-hardened steel Thermal simulation |
| title | Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel |
| title_full | Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel |
| title_fullStr | Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel |
| title_full_unstemmed | Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel |
| title_short | Clarification of the ferrite formed in the laser welded joint of the Al–Si coated press-hardened steel |
| title_sort | clarification of the ferrite formed in the laser welded joint of the al si coated press hardened steel |
| topic | Ferrite clarification In-situ observation Al–Si coating Laser welding Press-hardened steel Thermal simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423004179 |
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