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| Micro-mechanical properties of 2219 welded joints with twin wire welding | |
| 引用本文： | 徐文立[1,2] 李庆芬 孟庆国 方洪渊 高娜. Micro-mechanical properties of 2219 welded joints with twin wire welding[J]. 中国焊接, 2006, 15(3): 24-28 |
| 作者姓名： | 徐文立[1 2] 李庆芬 孟庆国 方洪渊 高娜 |
| 作者单位： | [1]School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001 [2]State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001 |
| 基金项目： | The project is supported by Postdoctoral Science Fund of China and Postdoctoral Fund of Heilongjiang Province. |
| 摘 要： | |
| 关 键 词： | 双丝焊 纳米压痕方法 机械性能 连接强度 焊接接头 |
Micro-mechanical properties of 2219 welded joints with twin wire welding |
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| Xu Wenli,Li Qingfen,Meng Qingguo,Fang Hongyuan,Gao Na. Micro-mechanical properties of 2219 welded joints with twin wire welding[J]. China Welding, 2006, 15(3): 24-28 | |
| Authors: | Xu Wenli Li Qingfen Meng Qingguo Fang Hongyuan Gao Na |
| Affiliation: | 1. School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001;State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001 2. School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001 3. State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001 |
| Abstract: | Nanoindentation method was adopted to investigate the distribution regularities of micro-mechanical properties of 2219 twin wire welded joints, thus providing the necessary theoretical basis and guidance for joint strengthening and improvement of welding procedure. Experimental results show that in weld zone, micro-mechanical properties are seriously uneven. Both hardness and elastic modulus distribute as uneven sandwich layers, while micro-mechanical properties in bond area are much more uniform than weld zone;In heat-affected zone of 2219 twin wire welded joint, distribution regularity of hardness is similar to elastic modulus. The average hardness in quenching zone is higher than softening zone, and the average elastic modulus in solid solution zone is slightly higher than softening zone. As far as the whole welded joint is concerned, metal in weld possesses the lowest hardness. For welded specimens without reinforcement, fracture position is the weld when tensioning. While for welded specimens with reinforcement, bond area is the poorest position with joint strength coefficient of 61%. So, it is necessary to strengthen the poor positions--weld and bond area of 2219 twin wire welded joint in order to solve joint weakening of welding this kind of alloy. |
| Keywords: | twin wire welding nanoindentation method micro-mechanical properties joint strengthening |
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