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| Effect of Laser Shock Strengthening on the Corrosion Properties of 2219 Aluminum Alloy in the Propellant of Tungsten Inter-gas Arc Welding |
| Received:August 28, 2023 Revised:December 05, 2023 |
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| DOI：10.7643/issn.1672-9242.2024.01.005 |
| KeyWord:laser shock 2219 aluminum alloy tungsten inter-gas arc welding corrosion electrochemical test propellant |
| Author | Institution |
| HAO Nan |
Zhijian Laboratory,Xi'an , China |
| WANG Huanchun |
Zhijian Laboratory,Xi'an , China ;Shaanxi Provincial Key Laboratory of Special Energy Chemistry and Materials, Xi'an , China |
| HUANG Dan |
School of Missile Engineering, Rocket Army Engineering University, Xi'an , China |
| MA Lan |
School of Missile Engineering, Rocket Army Engineering University, Xi'an , China |
| CAO Yuhao |
Zhijian Laboratory,Xi'an , China |
| MU Xiaogang |
Zhijian Laboratory,Xi'an , China ;Shaanxi Provincial Key Laboratory of Special Energy Chemistry and Materials, Xi'an , China |
| WANG Xuanjun |
Zhijian Laboratory,Xi'an , China ;Shaanxi Provincial Key Laboratory of Special Energy Chemistry and Materials, Xi'an , China |
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| Abstract: |
| The work aims to improve the corrosion resistance of 2219 aluminum alloy TIG weld. Laser shock technology was used to strengthen the weld, and the surface residual stress, phase composition and element state before and after treatment were compared and analyzed. At the same time, the change of corrosion rate was measured by static immersion weight loss and electrochemical methods. The element state of the 2219 aluminum alloy weld did not change after laser shock strengthening, but the residual tensile stress in the weld became the residual compressive stress. The self-corrosion potential in the TIG welding zone of 2219 aluminum alloy decreased obviously. Compared with the specimens without laser shock treatment, the average corrosion current in the core zone and transition zone was reduced by 14% and 12.7%, and the corrosion rate was reduced by 16.9% and 12.9%, respectively. Therefore, laser shock strengthening treatment can significantly improve the corrosion resistance of 2219 aluminum alloy TIG weld, which provides technical reference for improving the safety and lightweight of special equipment. |
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