Wang Li, Lijun Yang, Yiming Huang, Yunfu Tian, Chenpeng Jia. Study on Penetration Characteristics of Plasma Electrical Signals in Laser Welding of TC4 Titanium Alloy[J]. Chinese Journal of Lasers, 2022, 49(22): 2202018

Search by keywords or author
- Chinese Journal of Lasers
- Vol. 49, Issue 22, 2202018 (2022)

Fig. 1. Schematic of experimental equipment

Fig. 2. Schematic of electrical signal acquisition

Fig. 3. Photoelectric synchronization signals in laser welding of TC4 titanium alloy. (a) Plasma images and area; (b) electrical signal

Fig. 4. Front and back morphologies of welds under different heat input conditions. (a1)(a2) 43.33 J/mm; (b1)(b2) 46.43 J/mm;(c1)(c2) 50.00 J/mm; (d1)(d2) 54.17 J/mm; (e1)(e2) 59.10 J/mm; (f1)(f2) 65.00 J/mm

Fig. 5. Typical plasma electrical signals when heat input is less than 59.10 J/mm. (a) 43.33 J/mm; (b) 46.43 J/mm; (c) 50.00 J/mm; (d)54.17 J/mm

Fig. 6. Typical plasma electrical signals when heat input is not less than 59.10 J/mm. (a) 59.10 J/mm; (b) 65.00 J/mm

Fig. 7. Characteristic oscillation frequencies of electrical signals at initial stage under different heat inputs

Fig. 8. Oscillation frequency change process of plasma electric signals in relatively stable stage. (a) Partial penetration weld;(b) full penetration weld

Fig. 9. Pressure offset versus keyhole radius
|
Table 1. Weld size
|
Table 2. Characteristic oscillation frequencies of plasma electrical signal in range of 0-1.5 s
|
Table 3. Characteristic oscillation frequencies of plasma electrical signal in range of 1.5-3.0 s

Set citation alerts for the article
Please enter your email address