Wei Zhang, Qinghua Lu, Xinhuai Ren, Yongzhen Bai, Jiewen Jin, Yangling Ou. Fatigue Properties and Fracture Behavior of 5052 Aluminum Alloys Welded by High Frequency Micro-Vibration Laser[J]. Chinese Journal of Lasers, 2019, 46(3): 0302012
- Chinese Journal of Lasers
- Vol. 46, Issue 3, 0302012 (2019)
Fig. 1. Schematic of experimental platform for high frequency micro-vibration laser welding
Fig. 2. Schematic of residual stress test point and fatigue sample
Fig. 3. Microstructures at fusion lines. (a) Weld fusion line 1; (b) weld fusion line 5
Fig. 4. Residual stress of double-line welded sheet
Fig. 5. S-N curves of base metal and double-line sample
Fig. 6. BM fatigue fracture morphology of 5052 aluminum alloy. (a) Fracture morphology and position diagram; (b) fatigue step; (c) secondary crack; (d) dimple
Fig. 7. Fatigue fracture morphologies of welded joints. (a) Fracture of multiple fatigue sources; (b) fracture of single fatigue source; (c) hole; (d) fatigue striations; (e) crack tip junctions
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Table 1. Chemical compositions of 5052 aluminum alloy
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Table 2. Parameters for test (P=5 kW; v=0.03 m/s; DDA=-15 mm)
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Table 3. Residual stress and fatigue strength coefficient
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