Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy
2A12-T4 aluminum alloy was friction stir spot welded, and the microstructural characteristics and mechanical properties of the joints were investigated. A softened microstructural region existed in the joint, and it consisted of stir zone (SZ), thermal mechanically affected zone (TMAZ), and heat aff...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/719306 |
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| author | Huijie Liu Yunqiang Zhao Xingye Su Lilong Yu Juncai Hou |
| author_facet | Huijie Liu Yunqiang Zhao Xingye Su Lilong Yu Juncai Hou |
| author_sort | Huijie Liu |
| collection | DOAJ |
| description | 2A12-T4 aluminum alloy was friction stir spot welded, and the microstructural characteristics and mechanical properties of the joints were investigated. A softened microstructural region existed in the joint, and it consisted of stir zone (SZ), thermal mechanically affected zone (TMAZ), and heat affected zone (HAZ). The minimum hardness was located in TMAZ, and the average hardness value in SZ can be improved by appropriately increasing welding heat input. The area of complete bonding region at the interface increased with increasing welding heat input because more interface metals were mixed. In a certain range of FSSW parameters, the tensile shear failure load of the joint increased with increasing rotation speed, but it decreased with increasing plunge rate or decreasing shoulder plunging depth. Two kinds of failure modes, that is, shear fracture mode and tensile-shear mixed fracture mode, can be observed in the tensile shear tests, and the joint that failed in the tensile-shear mixed fracture mode possessed a high carrying capability. |
| format | Article |
| id | doaj-art-313e69e360ca4b8db49e01d086e82115 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-313e69e360ca4b8db49e01d086e821152025-02-03T05:50:07ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/719306719306Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum AlloyHuijie Liu0Yunqiang Zhao1Xingye Su2Lilong Yu3Juncai Hou4State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Chemical Equipment, Shenyang University of Technology, Liaoyang 111003, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China2A12-T4 aluminum alloy was friction stir spot welded, and the microstructural characteristics and mechanical properties of the joints were investigated. A softened microstructural region existed in the joint, and it consisted of stir zone (SZ), thermal mechanically affected zone (TMAZ), and heat affected zone (HAZ). The minimum hardness was located in TMAZ, and the average hardness value in SZ can be improved by appropriately increasing welding heat input. The area of complete bonding region at the interface increased with increasing welding heat input because more interface metals were mixed. In a certain range of FSSW parameters, the tensile shear failure load of the joint increased with increasing rotation speed, but it decreased with increasing plunge rate or decreasing shoulder plunging depth. Two kinds of failure modes, that is, shear fracture mode and tensile-shear mixed fracture mode, can be observed in the tensile shear tests, and the joint that failed in the tensile-shear mixed fracture mode possessed a high carrying capability.http://dx.doi.org/10.1155/2013/719306 |
| spellingShingle | Huijie Liu Yunqiang Zhao Xingye Su Lilong Yu Juncai Hou Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy Advances in Materials Science and Engineering |
| title | Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy |
| title_full | Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy |
| title_fullStr | Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy |
| title_full_unstemmed | Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy |
| title_short | Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy |
| title_sort | microstructural characteristics and mechanical properties of friction stir spot welded 2a12 t4 aluminum alloy |
| url | http://dx.doi.org/10.1155/2013/719306 |
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