Deformation control during the laser welding of a Ti6Al4V thin plate using a synchronous gas cooling method
| Autor: | Haiying Wei, Yi Zhang, Yeyong Ying, Xixia Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Plastic welding Heat-affected zone Materials science Mechanical Engineering Laser beam welding 02 engineering and technology Welding Deformation (meteorology) 021001 nanoscience & nanotechnology Electric resistance welding law.invention 020901 industrial engineering & automation Mechanics of Materials law Residual stress lcsh:TA401-492 General Materials Science Cold welding lcsh:Materials of engineering and construction. Mechanics of materials Composite material 0210 nano-technology |
| Zdroj: | Materials & Design, Vol 90, Iss, Pp 931-941 (2016) |
| ISSN: | 0264-1275 |
| Popis: | To reduce longitudinal flexural deformations during the laser welding of Ti6Al4V thin plates, this paper presents a synchronous gas cooling method (SGCM) that uses liquid nitrogen-cooled argon gas with the laser source to actively control the cooling process during welding. Compared to the conventional welding, the dimension of the fusion zone (FZ) obtained with SGCM welding is the same, while the prior β grains and the acicular α′ phase for the SGCM become fine on the morphology. In the heat affected zone (HAZ), the dimension on the SGCM condition is smaller than that for the conventional welding. Furthermore, an SGCM laser welding model is developed. Simulations of the traditional laser welding process and the welding process with the SGCM show that the synchronous gas cooling affects the longitudinal flexural deformation and the longitudinal residual stress. The simulation results are verified by experiments, which show that a 71% reduction in deformation, a 21% reduction in longitudinal residual stress and a 14% reduction in longitudinal plastic strain is achieved with this method. Keywords: Laser welding, Synchronous gas cooling method, Welding deformation, Ti6Al4V titanium alloy |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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