Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint
Replacing steel with aluminum alloy is appealing to realize the lightweight of ship structure, so it is inevitable to weld these two materials in products. When joining AA5083 aluminum alloy to FH36 steel with the thickness of 6 mm by tungsten inert gas (TIG) arc welding process, the liquid Zn-based...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-06-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523003866 |
| _version_ | 1797807223725883392 |
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| author | Yueting Ma Honggang Dong Peng Li Baosheng Wu Wei Wu Weifang Qian Baosen Wang |
| author_facet | Yueting Ma Honggang Dong Peng Li Baosheng Wu Wei Wu Weifang Qian Baosen Wang |
| author_sort | Yueting Ma |
| collection | DOAJ |
| description | Replacing steel with aluminum alloy is appealing to realize the lightweight of ship structure, so it is inevitable to weld these two materials in products. When joining AA5083 aluminum alloy to FH36 steel with the thickness of 6 mm by tungsten inert gas (TIG) arc welding process, the liquid Zn-based filler metal reacted with steel matrix to form Fe-Zn intermetallic compounds (IMCs) and Fe-Al IMCs. A novel interface structure composed of spinous Г-Fe3Zn10, thinner η-Fe2Al5Zn0.4 and a small number of dispersed δ-FeZn10 with a relatively high bonding strength can be obtained at the weld seam/steel interface by optimizing the backing welding current. When the backing welding current was 120 A, the maximum tensile strength of joint could reach 98 MPa. Simulation indicated that a large stress concentration developed at the weld seam/steel interface, within crack active temperature range of Fe-Zn and Fe-Al IMCs, during the backing welding process. The lattice misfit of δ-FeZn10/η-Fe2Al5Zn0.4 and Г-Fe3Zn10/η-Fe2Al5Zn0.4 interfaces were 19.9% and 9.4%, which revealed that dislocations were more likely to accumulate around δ-FeZn10, providing the location of crack initiation in aluminum alloy/steel welded joints. |
| first_indexed | 2024-03-13T06:19:21Z |
| format | Article |
| id | doaj.art-1db6ffb36a034aa386db9bf927fb03be |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-13T06:19:21Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-1db6ffb36a034aa386db9bf927fb03be2023-06-10T04:27:00ZengElsevierMaterials & Design0264-12752023-06-01230111971Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded jointYueting Ma0Honggang Dong1Peng Li2Baosheng Wu3Wei Wu4Weifang Qian5Baosen Wang6School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, PR ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, PR China; Corresponding author.School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, PR ChinaSchool of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, PR ChinaBaosteel Central Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 200431, PR ChinaBaosteel Central Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 200431, PR ChinaBaosteel Central Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 200431, PR ChinaReplacing steel with aluminum alloy is appealing to realize the lightweight of ship structure, so it is inevitable to weld these two materials in products. When joining AA5083 aluminum alloy to FH36 steel with the thickness of 6 mm by tungsten inert gas (TIG) arc welding process, the liquid Zn-based filler metal reacted with steel matrix to form Fe-Zn intermetallic compounds (IMCs) and Fe-Al IMCs. A novel interface structure composed of spinous Г-Fe3Zn10, thinner η-Fe2Al5Zn0.4 and a small number of dispersed δ-FeZn10 with a relatively high bonding strength can be obtained at the weld seam/steel interface by optimizing the backing welding current. When the backing welding current was 120 A, the maximum tensile strength of joint could reach 98 MPa. Simulation indicated that a large stress concentration developed at the weld seam/steel interface, within crack active temperature range of Fe-Zn and Fe-Al IMCs, during the backing welding process. The lattice misfit of δ-FeZn10/η-Fe2Al5Zn0.4 and Г-Fe3Zn10/η-Fe2Al5Zn0.4 interfaces were 19.9% and 9.4%, which revealed that dislocations were more likely to accumulate around δ-FeZn10, providing the location of crack initiation in aluminum alloy/steel welded joints.http://www.sciencedirect.com/science/article/pii/S0264127523003866Aluminum alloy/steel dissimilar jointStressFe-Zn IMCsFe-Al IMCsMechanical property |
| spellingShingle | Yueting Ma Honggang Dong Peng Li Baosheng Wu Wei Wu Weifang Qian Baosen Wang Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint Materials & Design Aluminum alloy/steel dissimilar joint Stress Fe-Zn IMCs Fe-Al IMCs Mechanical property |
| title | Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint |
| title_full | Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint |
| title_fullStr | Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint |
| title_full_unstemmed | Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint |
| title_short | Control of various Zn-based weld seam/steel interface structures in AA5083/FH36 steel welded joint |
| title_sort | control of various zn based weld seam steel interface structures in aa5083 fh36 steel welded joint |
| topic | Aluminum alloy/steel dissimilar joint Stress Fe-Zn IMCs Fe-Al IMCs Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523003866 |
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