Mechanical Properties of 316L Stainless Steel Lattice Structure Prepared by Selective Laser Melting

Shu Du; Ayiguli·Kasimu; Yutao Zhang; Wurikaixi·Aiyiti

doi:10.3788/LOP202259.1914005

Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1914005(2022)

Mechanical Properties of 316L Stainless Steel Lattice Structure Prepared by Selective Laser Melting

Shu Du, Ayiguli·Kasimu, Yutao Zhang, and Wurikaixi·Aiyiti^*

Author Affiliations

School of Mechanical Engineering, Xinjiang University, Urumqi 830017, Xinjiang, China

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Figures & Tables(15)

Fig. 1. Lattice structure diagrams. (a) (d) Lattice type A; (b) (e) lattice type B; (c) (f) lattice type C

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Fig. 2. Lattice structure samples printed by SLM

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Fig. 3. Finite element analysis model

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Fig. 4. Three types of lattice structure stress-strain curves. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 5. Change of elastic modulus of lattice structure samples with porosity. (a) Aperture is 0.6 mm; (b) aperture is 0.9 mm

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Fig. 6. Change of yield strength of lattice structure samples with porosity. (a) Aperture is 0.6 mm; (b) aperture is 0.9 mm

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Fig. 7. Numerical relationship between porosity and elastic modulus of lattice structure. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 8. Lattice structure stress distributions. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 9. Lattice structure displacement distributions. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 10. Deformation mechanism of lattice structure. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 11. Finite element analysis of deformation mechanism. (a) Lattice type A; (b) lattice type B; (c) lattice type C

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Fig. 12. Surface details of lattice structure sample captured by the microscope

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Fig. 13. Comparison of rod diameters measured in different directions (top view and side view)

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Table 1. Design parameters of lattice structure

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Table 1. Design parameters of lattice structure

No.	Sample	Porosity /%	Cell size /（mm×mm×mm）	Stem diameter /mm	Aperture /mm
1	A-50%-0.6	50	1.75×1.75×1.75	0.65	0.6
2	A-60%-0.6	60	1.5×1.5×1.5	0.49	0.6
3	A-70%-0.6	70	1.4×1.4×1.4	0.40	0.6
4	A-80%-0.6	80	1.3×1.3×1.3	0.31	0.6
5	B-50%-0.6	50	1.2×1.2×1.2	0.58	0.6
6	B-60%-0.6	60	1.1×1.1×1.1	0.48	0.6
7	B-70%-0.6	70	1.0×1.0×1.0	0.35	0.6
8	B-80%-0.6	80	0.8×0.8×0.8	0.20	0.6
9	C-50%-0.6	50	1.7×1.7×1.7	0.60	0.6
10	C-60%-0.6	60	1.5×1.5×1.5	0.48	0.6
11	C-70%-0.6	70	1.3×1.3×1.3	0.35	0.6
12	C-80%-0.6	80	1.2×1.2×1.2	0.26	0.6
13	A-50%-0.9	50	2.8×2.8×2.8	1.10	0.9
14	A-60%-0.9	60	2.5×2.5×2.5	0.85	0.9
15	A-70%-0.9	70	2.1×2.1×2.1	0.58	0.9
16	A-80%-0.9	80	2.0×2.0×2.0	0.47	0.9
17	B-50%-0.9	50	1.9×1.9×1.9	1.00	0.9
18	B-60%-0.9	60	1.6×1.6×1.6	0.65	0.9
19	B-70%-0.9	70	1.4×1.4×1.4	0.50	0.9
20	B-80%-0.9	80	1.2×1.2×1.2	0.33	0.9
21	C-50%-0.9	50	2.5×2.5×2.5	0.90	0.9
22	C-60%-0.9	60	2.2×2.2×2.2	0.68	0.9
23	C-70%-0.9	70	2.0×2.0×2.0	0.55	0.9
24	C-80%-0.9	80	1.8×1.8×1.8	0.40	0.9

Table 2. Printing defects detected by industrial micro-nano CT system
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Table 2. Printing defects detected by industrial micro-nano CT system
No. Sample Total volume /mm³ Defect volume /mm³ Defect volume ratio /%
1 A-70%-0.6 163.735 0.032 0.02
2 B-70%-0.6 150.399 0.084 0.06
3 C-70%-0.6 153.983 0.146 0.09

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Shu Du, Ayiguli·Kasimu, Yutao Zhang, Wurikaixi·Aiyiti. Mechanical Properties of 316L Stainless Steel Lattice Structure Prepared by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1914005

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