The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint
In this work, the microstructure and growth behavior of Al-Fe intermetallic compounds (IMCs), which formed at interface of weld steel-aluminum joint, are successfully analyzed via the combination of experiment and physical model. A layer IMCs consists of Fe<sub>2</sub>Al<sub>5</...
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MDPI AG
2022-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/10/3563 |
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| author | Xiaoquan Yu Jiankang Huang Tao Yang Ding Fan |
| author_facet | Xiaoquan Yu Jiankang Huang Tao Yang Ding Fan |
| author_sort | Xiaoquan Yu |
| collection | DOAJ |
| description | In this work, the microstructure and growth behavior of Al-Fe intermetallic compounds (IMCs), which formed at interface of weld steel-aluminum joint, are successfully analyzed via the combination of experiment and physical model. A layer IMCs consists of Fe<sub>2</sub>Al<sub>5</sub> and Fe<sub>4</sub>Al<sub>13</sub>, in which the Fe<sub>2</sub>Al<sub>5</sub> is the main compound in the layer. The IMCs layer thickness increases with the increase of the heat input and the maximum thickness of IMCs layer is 22 ± 2 μm. The high vacancy concentration of Fe<sub>2</sub>Al<sub>5</sub> IMCs provides the diffusion path for Al atoms to migrate through the IMCs layer for growing towards to steel substrate. By using the calculated temperature profiles as inputs, the combined 2D cellular automata (CA)-Monte Carlo (MC) model is applied to simulate the grain distribution and interfacial morphology evolution at the Al-steel interface. This 2D model simulates the IMCs nucleation, growth, and solute redistribution. The numerical results are in good agreement with the experimental results, suggesting that the growth process can be divided four stages, and the thickness of the Fe<sub>2</sub>Al<sub>5</sub> layer increases nonlinearly with the increase of the growth time. The whole nucleation and growth process experienced 1.7~2 s, and the fastest growth rate is 8 μm/s. The addition of Si element will influence diffusion path of Al atom to form different interface morphology. The effects of peak temperature, cooling time, and the thermal gradient on the IMCs thickness are discussed. It shows that the peak temperature has the major influence on the IMCs thickness. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:30:41Z |
| publishDate | 2022-05-01 |
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| series | Materials |
| spelling | doaj.art-38ecab71e89d4cfc86e86aa6eb3dcd5f2023-11-23T11:57:15ZengMDPI AGMaterials1996-19442022-05-011510356310.3390/ma15103563The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld JointXiaoquan Yu0Jiankang Huang1Tao Yang2Ding Fan3School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaIn this work, the microstructure and growth behavior of Al-Fe intermetallic compounds (IMCs), which formed at interface of weld steel-aluminum joint, are successfully analyzed via the combination of experiment and physical model. A layer IMCs consists of Fe<sub>2</sub>Al<sub>5</sub> and Fe<sub>4</sub>Al<sub>13</sub>, in which the Fe<sub>2</sub>Al<sub>5</sub> is the main compound in the layer. The IMCs layer thickness increases with the increase of the heat input and the maximum thickness of IMCs layer is 22 ± 2 μm. The high vacancy concentration of Fe<sub>2</sub>Al<sub>5</sub> IMCs provides the diffusion path for Al atoms to migrate through the IMCs layer for growing towards to steel substrate. By using the calculated temperature profiles as inputs, the combined 2D cellular automata (CA)-Monte Carlo (MC) model is applied to simulate the grain distribution and interfacial morphology evolution at the Al-steel interface. This 2D model simulates the IMCs nucleation, growth, and solute redistribution. The numerical results are in good agreement with the experimental results, suggesting that the growth process can be divided four stages, and the thickness of the Fe<sub>2</sub>Al<sub>5</sub> layer increases nonlinearly with the increase of the growth time. The whole nucleation and growth process experienced 1.7~2 s, and the fastest growth rate is 8 μm/s. The addition of Si element will influence diffusion path of Al atom to form different interface morphology. The effects of peak temperature, cooling time, and the thermal gradient on the IMCs thickness are discussed. It shows that the peak temperature has the major influence on the IMCs thickness.https://www.mdpi.com/1996-1944/15/10/3563Al-Fe intermetallic compoundsgrowth kineticsaluminum-steel weld jointnumerical simulation |
| spellingShingle | Xiaoquan Yu Jiankang Huang Tao Yang Ding Fan The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint Materials Al-Fe intermetallic compounds growth kinetics aluminum-steel weld joint numerical simulation |
| title | The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint |
| title_full | The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint |
| title_fullStr | The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint |
| title_full_unstemmed | The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint |
| title_short | The Growth Behavior for Intermetallic Compounds at the Interface of Aluminum-Steel Weld Joint |
| title_sort | growth behavior for intermetallic compounds at the interface of aluminum steel weld joint |
| topic | Al-Fe intermetallic compounds growth kinetics aluminum-steel weld joint numerical simulation |
| url | https://www.mdpi.com/1996-1944/15/10/3563 |
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