Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment
Abstract
:1. Introduction
2. Materials and Experiments
2.1. Sample Preparation
2.2. X-ray Diffraction Measurement of Residual Stress
2.3. Indentation Strain Measurement of Residual Stress
3. Finite Element Simulation
3.1. Simulation of Weld Temperature
3.2. Simulation of Welding Residual Stress
3.3. Simulation of UIT
4. Results and Discussion
4.1. Temperature Distribution
4.2. Residual Stress Distribution before and after UIT
4.3. Mechanism of Stress Relaxation
5. Conclusions
- (1)
- The numerical results are in a good agreement with the experimental data, which showed that the UIT could decrease the tensile residual stresses to a large degree and even generate the compressive residual stresses.
- (2)
- After UIT, longitudinal residual stresses basically turned into the small tensile stress state from large tensile stress state, and transverse residual stresses have mainly turned into compressive stresses from large tensile stress.
- (3)
- In the through-thickness direction, the average decrease of longitudinal residual stress is 259.9 MPa after UIT. The longitudinal tensile residual stress is eliminated at about 1.5 mm below the upper surface, and the transverse tensile residual stresses become compressive within about 1.9 to 3.3 mm away from the upper surface.
- (4)
- The overall residual stresses of the thin plate can be sharply decreased after UIT, but the residual stresses are increased in the middle layer of the thick plate.
- (5)
- The plastic deformation, the energy stability and the twinning contribute to the relaxation of residual stresses after UIT.
Author Contributions
Funding
Conflicts of Interest
References
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Composition | C | Si | Mn | P | S | Cr | Mo | Ni | Cu |
---|---|---|---|---|---|---|---|---|---|
304 | 0.048 | 0.419 | 1.228 | 0.031 | 0.0018 | 18.08 | 0.011 | 8.113 | 0.0096 |
A102 | 0.053 | 0.50 | 1.78 | 0.028 | 0.003 | 18.96 | 0.26 | 10.21 | 0.41 |
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Chen, J.; Chu, J.; Jiang, W.; Yao, B.; Zhou, F.; Wang, Z.; Zhao, P. Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment. Materials 2020, 13, 837. https://doi.org/10.3390/ma13040837
Chen J, Chu J, Jiang W, Yao B, Zhou F, Wang Z, Zhao P. Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment. Materials. 2020; 13(4):837. https://doi.org/10.3390/ma13040837
Chicago/Turabian StyleChen, Jianfei, Jingyu Chu, Wenchun Jiang, Bin Yao, Fan Zhou, Zhenbo Wang, and Pengcheng Zhao. 2020. "Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment" Materials 13, no. 4: 837. https://doi.org/10.3390/ma13040837