Comparison of Structure and Performance of Laser Welded Joints of SiC<sub>p</sub>/Al Composite Materials

Wenhao Sun; Yongqiang Fan; Guotao Zhang; Wu Tao; Shanglu Yang

doi:10.3788/CJL202148.1002105

Chinese Journal of Lasers, Volume. 48, Issue 10, 1002105(2021)

Comparison of Structure and Performance of Laser Welded Joints of SiC_p/Al Composite Materials

Wenhao Sun^1,2, Yongqiang Fan¹, Guotao Zhang¹, Wu Tao¹, and Shanglu Yang^1,3、*

¹Laboratory of High Power Fiber Laser Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²University of Chinese Academy of Sciences, Beijing 100049, China

³Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(16)

Fig. 1. Principles of three laser welding processes. (a) Hybrid laser-CMT welding; (b) single laser beam welding with filler wire; (c) dual laser beam welding with filler wire

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Fig. 2. Dimensions of the tensile specimen

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Fig. 3. Surfaces and cross-sectional morphologies of welds obtained by different welding processes. (a) Hybrid laser-CMT welding; (b) single laser beam welding with filler wire; (c) dual laser beam welding with filler wire

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Fig. 4. Mechanical properties of the joints of different welding processes

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Fig. 5. Samples after tensile shear testing

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$SEM image of fracture after weld tensile failure. (a) Hybrid laser-CMT welding; (b) single laser beam welding with filler wire; (c) dual laser beam welding with filler wire$

Fig. 6. SEM image of fracture after weld tensile failure. (a) Hybrid laser-CMT welding; (b) single laser beam welding with filler wire; (c) dual laser beam welding with filler wire

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Fig. 7. Microhardness distributions of joints with different welding processes

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Fig. 8. Microhardness distribution of single laser beam welding with filler wire welded joints. (a) Weld section; (b) position of the greatest hardness; (c) position of the least hardness

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Fig. 9. Element distribution of the weld zone. (a) SEM image; (b) Al element; (c) Si element; (d) C element

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Fig. 10. XRD image of the single laser beam welding with filler wire joints

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Fig. 11. Cross-sectional morphologies and pore distributions of different welded joints. (a) Cross-sectional morphology in X direction; (b) pore distribution in X direction; (c) cross-sectional morphology in Y direction; (d) pore distribution in Y direction

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Fig. 12. Microstructures of the joints of different welding processes. (a) Hybrid laser-CMT welding; (b) single laser beam welding with filler wire; (c) dual laser beam welding with filler wire

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Fig. 13. Distributions of SiC particles at the base metal and welded joints. (a) Distributions of the SiC particles; (b) division of the regions; (c) distributions of the particles in different regions

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Table 1. Mass fraction of elements in 6005A aluminum alloy and ER5356 welding wire unit: %
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Table 1. Mass fraction of elements in 6005A aluminum alloy and ER5356 welding wire unit: %
Element Si Fe Cu Mn Mg Cr Zn Ti Al
6005A 0.50--0.90 0.35 0.30 0.50 0.40--0.70 0.30 0.20 0.10 Bal.
ER5356 0.25 0.40 0.10 0.05--0.20 4.50--5.50 0.05--0.20 0.25 0.15 Bal.

Table 2. Optimal welding parameters of different processes

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Table 2. Optimal welding parameters of different processes

Parameter	Hybrid laser-CMT welding	Single laser beamwelding with filler wire	Dual laser beam weldingwith filler wire
Laser spot diameter /μm	500.0	560.0	560.0
Laser power /kW	6.0	7.7	8.5
Welding speed /(m·min^-1)	4.2	4.2	4.2
Wire feeding speed /(m·min^-1)	6.0	6.0	6.0
Arc voltage /V	11.8	2.0	2.0
Arc current /A	105.0	20.0	20.0
Heat input /(J·mm^-1)	113.7	110.6	122.0

Table 3. Porosities in the weld zone of different welding processes unit: %
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Table 3. Porosities in the weld zone of different welding processes unit: %
Process X direction Y direction
Hybrid laser-CMT welding 1.65 2.70
Single laser beam weldingwith filler wire 1.40 1.18
Dual laser beam weldingwith filler wire 2.01 6.85

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Wenhao Sun, Yongqiang Fan, Guotao Zhang, Wu Tao, Shanglu Yang. Comparison of Structure and Performance of Laser Welded Joints of SiC_p/Al Composite Materials[J]. Chinese Journal of Lasers, 2021, 48(10): 1002105

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