Laser Additive Manufacturing and Heat Transfer Performance Measurement of Lattice Structure Heat Exchanger

Jiayu Liang; Wenyang Zhang; Wei Liu; Bingqing Chen

doi:10.3788/CJL220657

Chinese Journal of Lasers, Volume. 50, Issue 4, 0402014(2023)

Laser Additive Manufacturing and Heat Transfer Performance Measurement of Lattice Structure Heat Exchanger

Jiayu Liang^*, Wenyang Zhang, Wei Liu, and Bingqing Chen

Author Affiliations

Institute of Welding and Plastic Forming,AECC Beijing Institute of Aeronautical Material, Beijing 100095, China

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Figures & Tables(20)

Fig. 1. Metallographic structures of specimens prepared by different materials.(a) TC4 alloy; (b) 316L stainless steel; (c) B30 alloy

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Fig. 2. Schematic of lattice unite cell

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Fig. 3. Lattice structures of different materials and their micro-nano CT 3D images.(a) TC4 alloy; (b) 316L stainless steel ; (c) B30 alloy

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Fig. 4. Micro-nano CT nondestructive test results of different material lattice structures.（a）316L stainless steel；（b）TC4 alloy；

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Fig. 5. Structural diagrams of standard plate-fin heat exchanger. (a) Schematic of splitting; (b) schematic diagram of assembly

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Fig. 6. Conventional plate-fin heat exchanger core.（a）Model；（b）part formed by laser powder bed melting

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Fig. 7. Heat exchanger core with lattice structure.（a）Model；（b）part formed by laser powder bed melting

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Fig. 8. Comparison of surface morphology of laser selective melting part before and after sandblasting. (a) Before sandblasting; (b) after sandblasting

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Fig. 9. 316L stainless lattice structure heat exchanger core.（a）Model；（b）part formed by laser powder bed melting

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Fig. 10. TC4 alloy lattice structure heat exchanger formed by laser powder bed melting.（a）Model；（b）physical picture

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Fig. 11. B30 alloy lattice structure heat exchanger formed by laser powder bed melting.（a）Model；（b）physical picture

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Fig. 12. Heat exchange performance evaluation device for heat exchanger

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Fig. 13. Heat exchange curves of lattice structures.（a）316L stainless steel lattice structure；（b）TC4 alloy lattice structure；（c）B30 alloy lattice structure

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Table 1. Laser powder bed melting process parameters for lattice structures of different materials

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Table 1. Laser powder bed melting process parameters for lattice structures of different materials

Parameter	316L stainless steel	TC4 alloy	B30 alloy
Scanning strategy	Angle between layers is 67°
Laser power /W	285	340	242
Scanning speed /（mm/min）	960	1250	600
Spot diameter /mm	0.08	0.08	0.08
Thickness /mm	0.04	0.04	0.04
Scanning interval /mm	0.10	0.12	0.08

Table 2. CT parameters of 316L lattice structure
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Table 2. CT parameters of 316L lattice structure
Parameter Value
Tube voltage /kV 160
Tube current /μA 100
Integral time /ms 334
Resolution ratio /μm 10

Table 3. Heat exchange efficiencies of different material lattice structures
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Table 3. Heat exchange efficiencies of different material lattice structures
Parameter TC4 alloy 316L stainless steel B30 alloy
Simulated heat exchange efficiency /（m²/m³） 1270.1 1270.1 1270.1
Measured heat exchange efficiency /（m²/m³） 1263.1 1415.1 1491.0
Deviation /% -0.6 11.4 17.4

Table 4. Comparison of conventional plate-fin heat exchanger and TC4 alloy lattice structure heat exchanger
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Table 4. Comparison of conventional plate-fin heat exchanger and TC4 alloy lattice structure heat exchanger
Parameter Plate-fin structure Lattice structure
Deviation /
%
Heat exchange efficiency /
（m²/m³）
875 963 +10.1
Volume /cm³ 900 676 -24.9
Mass /g 1870.1 624.7 -66.6

Table 5. Size, surface roughness, dimensional accuracy of 316L stainless lattice structure heat exchanger core
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Table 5. Size, surface roughness, dimensional accuracy of 316L stainless lattice structure heat exchanger core
Parameter Designed value Measured value Deviation /mm
Average surface roughness /μm 2.35
Length /mm 150 149.94 -0.03
Width /mm 150 150.02 +0.02
Height /mm 21 20.95 -0.05

Table 6. Size, surface roughness, dimensional accuracy of TC4 alloy lattice structure heat exchanger core
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Table 6. Size, surface roughness, dimensional accuracy of TC4 alloy lattice structure heat exchanger core
Parameter Designed value Measured value Deviation / mm
Average surface roughness /μm 4.334
Length /mm 150 149.94 -0.06
Width /mm 150 150.03 +0.03
Height /mm 40 39.97 -0.03

Table 7. Size, surface roughness, dimensional accuracy of B30 alloy lattice structure heat exchanger core
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Table 7. Size, surface roughness, dimensional accuracy of B30 alloy lattice structure heat exchanger core
Parameter Designed value Measured value Deviation / mm
Average surface roughness /μm 7.611
Length /mm 150 149.95 -0.05
Width /mm 150 149.99 -0.01
Height /mm 40 40.02 +0.02

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Jiayu Liang, Wenyang Zhang, Wei Liu, Bingqing Chen. Laser Additive Manufacturing and Heat Transfer Performance Measurement of Lattice Structure Heat Exchanger[J]. Chinese Journal of Lasers, 2023, 50(4): 0402014

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Paper Information

Category: laser manufacturing

Received: Mar. 11, 2022

Accepted: May. 26, 2022

Published Online: Dec. 26, 2022

The Author Email: Liang Jiayu (893413869@qq.com)

DOI:10.3788/CJL220657

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Laser powder bed melting process parameters for lattice structures of different materials

Table 1. Laser powder bed melting process parameters for lattice structures of different materials

Table 2. CT parameters of 316L lattice structure

Table 2. CT parameters of 316L lattice structure

Table 3. Heat exchange efficiencies of different material lattice structures

Table 3. Heat exchange efficiencies of different material lattice structures

Table 4. Comparison of conventional plate-fin heat exchanger and TC4 alloy lattice structure heat exchanger

Table 4. Comparison of conventional plate-fin heat exchanger and TC4 alloy lattice structure heat exchanger

Table 5. Size, surface roughness, dimensional accuracy of 316L stainless lattice structure heat exchanger core

Table 5. Size, surface roughness, dimensional accuracy of 316L stainless lattice structure heat exchanger core

Table 6. Size, surface roughness, dimensional accuracy of TC4 alloy lattice structure heat exchanger core

Table 6. Size, surface roughness, dimensional accuracy of TC4 alloy lattice structure heat exchanger core

Table 7. Size, surface roughness, dimensional accuracy of B30 alloy lattice structure heat exchanger core

Table 7. Size, surface roughness, dimensional accuracy of B30 alloy lattice structure heat exchanger core