التفاصيل البيبلوغرافية
| العنوان: |
Study on the Effect of Preheating Temperature on Residual Stress in Laser Arc Composite Welding of Dissimilar Aluminum Alloys. |
| المؤلفون: |
Chen, Xiaowen, Tang, Song, Xie, Wanlin, Zhang, Meng, Song, Hao, Ran, Qingzheng, Zhang, Defen |
| المصدر: |
JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Jul2024, Vol. 76 Issue 7, p3832-3839, 8p |
| مصطلحات موضوعية: |
LASER arc welding, ALUMINUM alloy welding, RESIDUAL stresses, WELDING equipment, TEMPERATURE effect, ALUMINUM alloys, ELECTRIC arc, LASER peening |
| مستخلص: |
This study, based on the Simufact Welding analysis software, established a three-dimensional finite element computational model according to actual welding conditions. Using a combined volumetric heat source, we analyzed the magnitude and distribution of residual stress after laser arc composite welding of dissimilar aluminum alloys, and validated the results with experimental data. The influence of different preheating temperatures on the variation rule of residual stress in each part of the weldment was explored. The results showed that the calibration results of the combined volumetric heat source model were ideal, and that the simulation results of transverse and longitudinal residual stress were in good agreement with the actual results. The average residual stress in the heat-affected zone (HAZ) of the 5083-H112 aluminum alloy was about 190 MPa, which is close to the yield strength of the base metal at room temperature (193 MPa); the average residual stress at the weld seam was about 230 MPa; and the average residual stress in the HAZ of the 6063-T6 aluminum alloy was about 80 MPa. In addition, preheating before welding has a positive effect on reducing residual stress after welding. The optimal preheating temperature for the 5083-H112 aluminum alloy is about 170°C, and for 6063-T6 aluminum alloy it is about 220°C. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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