Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy
MIG welding and ER5356 welding wire were used for butt welding of 7075 aluminum alloy with a thickness of 3 mm. The joint was subjected to T6 heat treatment after welding. The microstructure, mechanical properties and corrosion resistance of the joints were analyzed by optical microscope, X-ray diff...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2024-03-01
|
| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000948 |
| _version_ | 1827307964633972736 |
|---|---|
| author | WANG Chenyang LIU Xiao LI Xiaoping ZHU Bin |
| author_facet | WANG Chenyang LIU Xiao LI Xiaoping ZHU Bin |
| author_sort | WANG Chenyang |
| collection | DOAJ |
| description | MIG welding and ER5356 welding wire were used for butt welding of 7075 aluminum alloy with a thickness of 3 mm. The joint was subjected to T6 heat treatment after welding. The microstructure, mechanical properties and corrosion resistance of the joints were analyzed by optical microscope, X-ray diffraction, scanning electron microscope and energy spectrometer combined with room temperature stretching, microhardness and electrochemical corrosion. The results show that the molten pool flow brings Zn, Cu and other alloying elements in the molten part of the base metal into the weld, and precipitates MgZn2 and AlCuMg phases during the welding process, which become the basis for the heat treatment and strengthening of the weld. After heat treatment, most of the precipitated phase melts into the matrix to form solid solution+aging strengthening, the joint tensile strength increases by 20%, and the weld hardness increases by 18.4%, the corrosion resistance improves. However, due to the limited alloying element content flowing into the weld from the base metal, the difference in mechanical properties between the welding wire and the base metal and the heat-affected zone softening phenomenon cannot be eliminated. |
| first_indexed | 2024-04-24T18:49:14Z |
| format | Article |
| id | doaj.art-1aac6fcad6924bd1bbd27d9879dd0307 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-24T18:49:14Z |
| publishDate | 2024-03-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-1aac6fcad6924bd1bbd27d9879dd03072024-03-27T03:28:07ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812024-03-0152314915710.11868/j.issn.1001-4381.2022.00094820240316Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloyWANG Chenyang0LIU Xiao1LI Xiaoping2ZHU Bin3Jiangsu Key Laboratory of Advanced Materials Design and Additive Manufacturing, Jiangsu University of Technology, Changzhou 213000, Jiangsu, ChinaJiangsu Key Laboratory of Advanced Materials Design and Additive Manufacturing, Jiangsu University of Technology, Changzhou 213000, Jiangsu, ChinaJiangsu Key Laboratory of Advanced Materials Design and Additive Manufacturing, Jiangsu University of Technology, Changzhou 213000, Jiangsu, ChinaJiangsu Key Laboratory of Advanced Materials Design and Additive Manufacturing, Jiangsu University of Technology, Changzhou 213000, Jiangsu, ChinaMIG welding and ER5356 welding wire were used for butt welding of 7075 aluminum alloy with a thickness of 3 mm. The joint was subjected to T6 heat treatment after welding. The microstructure, mechanical properties and corrosion resistance of the joints were analyzed by optical microscope, X-ray diffraction, scanning electron microscope and energy spectrometer combined with room temperature stretching, microhardness and electrochemical corrosion. The results show that the molten pool flow brings Zn, Cu and other alloying elements in the molten part of the base metal into the weld, and precipitates MgZn2 and AlCuMg phases during the welding process, which become the basis for the heat treatment and strengthening of the weld. After heat treatment, most of the precipitated phase melts into the matrix to form solid solution+aging strengthening, the joint tensile strength increases by 20%, and the weld hardness increases by 18.4%, the corrosion resistance improves. However, due to the limited alloying element content flowing into the weld from the base metal, the difference in mechanical properties between the welding wire and the base metal and the heat-affected zone softening phenomenon cannot be eliminated.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.0009487075 aluminum alloymig weldingheat treatmentweld microstructuremechanical propertycorrosion resistance |
| spellingShingle | WANG Chenyang LIU Xiao LI Xiaoping ZHU Bin Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy Cailiao gongcheng 7075 aluminum alloy mig welding heat treatment weld microstructure mechanical property corrosion resistance |
| title | Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy |
| title_full | Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy |
| title_fullStr | Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy |
| title_full_unstemmed | Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy |
| title_short | Heat treatment performance of ER5356 welding wire for MIG welding joint of 7075 aluminum alloy |
| title_sort | heat treatment performance of er5356 welding wire for mig welding joint of 7075 aluminum alloy |
| topic | 7075 aluminum alloy mig welding heat treatment weld microstructure mechanical property corrosion resistance |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000948 |
| work_keys_str_mv | AT wangchenyang heattreatmentperformanceofer5356weldingwireformigweldingjointof7075aluminumalloy AT liuxiao heattreatmentperformanceofer5356weldingwireformigweldingjointof7075aluminumalloy AT lixiaoping heattreatmentperformanceofer5356weldingwireformigweldingjointof7075aluminumalloy AT zhubin heattreatmentperformanceofer5356weldingwireformigweldingjointof7075aluminumalloy |