Study on welding pool behavior and joint mechanical properties of 2195-T8 Al-Li alloy by laser wire filling double-sided welding

Parameter	Density/ kg·m⁻³	Specific heat capacity/J·kg⁻¹·K⁻¹	Coefficient of thermal conductivity	Viscosity	Latent heat of fusion/J·kg⁻¹	Modulus of elasticity/GPa
Numerical	2 710	960	Ref. [14]	Ref. [15]	3.98×10⁵	72

Parameter	Poisson ratio	Coefficient of thermal expansion/K⁻¹	Surface radiation coefficient	Surface tension /N·m⁻¹	Temperature coefficient of surface tension
Numerical	0.33	2.23×10⁻⁵	0.4	0.7	−3.5×10⁻⁴

Table 2. Parameter setting of 1500 W welding test
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Table 2. Parameter setting of 1500 W welding test
Groups 1 2 3 4
Positive Welding speed/cm·min⁻¹ 50 50 45 45
Wire feeding speed/m·min⁻¹ 1.6 1.8 1.6 1.8
Back Welding speed/cm·min⁻¹ 50 50 45 45
Wire feeding speed/m·min⁻¹ 1.6 1.8 1.6 1.8

Table 3. Chemical composition of 2195-T8 Al-Li alloy
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Table 3. Chemical composition of 2195-T8 Al-Li alloy
Alloy material composition Cu Li Ag Zr Fe Mg Ti Al
Percentage of ingredients 3.7% 0.8% 0.2% 0.1% 0.1% 0.2% 0.068% Balance

Table 4. Chemical composition of ER2319 filament filling
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Table 4. Chemical composition of ER2319 filament filling
Welding wire material composition Cu Fe Mn Mg Si Zn Ti V Al
Percentage of ingredients 5.6% 0.3% 0.3% 0.2% 0.2% 0.1% 0.15% 0.1% Balance

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Zhengwei Yang, Jinshu Chen, Gan Tian, Wei Zhang, Jiawei Chen, Junling Xiao. Study on welding pool behavior and joint mechanical properties of 2195-T8 Al-Li alloy by laser wire filling double-sided welding[J]. Infrared and Laser Engineering, 2023, 52(2): 20220350

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