Forming Technology and Properties of 316L Stainless Steel by Selective Laser Melting

Yao Yansheng; Tang Jianping; Wang Jun; Ge Zhangsen; Zhang Chenglin

doi:10.3788/LOP202158.0114006

Laser & Optoelectronics Progress, Volume. 58, Issue 1, 114006(2021)

Forming Technology and Properties of 316L Stainless Steel by Selective Laser Melting

Yao Yansheng^1,2、*, Tang Jianping^1,3, Wang Jun¹, Ge Zhangsen^1,3, and Zhang Chenglin^1,3,4

Author Affiliations

¹School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China

²Key Laboratory of Intelligent Manufacturing of Construction Machinery, Hefei, Anhui 230601, China

³School of Engineering Science, University of Science and Technology of China, Hefei, Anhui 230027, China

⁴Anhui Tuobao Additive Manufacturing Technology Co., Ltd., Wuhu, Anhui 241200, China

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Figures & Tables(15)

Fig. 1. Image of 316L stainless steel powder

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Fig. 2. Particle size distribution of 316L stainless steel powder

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Fig. 3. Surface morphologies of specimens formed at different laser energy densities. (a)E=48 J/mm³; (b) E=54 J/mm³; (c)E=60 J/mm³; (d) E=66 J/mm³

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Fig. 4. Surface topography of formed specimens corresponding to different parameters at the same laser energy density.(a) $P$ =160 W, v=1000 mm/s; (b) $P$ =180 W,v=1125 mm/s;(c) $P$

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Fig. 5. Surface hardness of 316L stainless steel formed at different laser energy densities

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Fig. 6. Tensile strength and elongation of formed specimens at different laser energy densities

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Fig. 7. Tensile strength and elongation of specimens formed at different process parameters

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Fig. 8. Surface hardness of formed specimens at two parameters

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Fig. 9. Tensile strength and elongation of formed specimens at two parameters. （a）

P

=180 W, v=1000 mm/s;（b）

P

=180 W, v=900 mm/s

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Fig. 10. Fracture morphologies.（a） Original specimen;（b） water-cooled specimen;（c） air-cooled specimen

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Fig. 11. Polarization curves of 316L stainless steel before and after heat treatment

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Fig. 12. Microstructures of 316L stainless steel before and after heat treatment.（a）Original specimen;（b）air-cooled specimen;（c）water-cooled specimen

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Fig. 13. XRD spectra of 316L stainless steel before and after heat treatment

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Table 1. Chemical composition of 316L stainless steel powder
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Table 1. Chemical composition of 316L stainless steel powder
Element C Si P S Mn Mo Ni Cr Fe
Mass fraction/% ≤0.03 ≤1.00 ≤0.035 ≤0.03 ≤2.00 2.00-3.00 10.00-14.00 16.00-18.00 Bal.

Table 2. Relative density of specimens formed at different process parameters

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Table 2. Relative density of specimens formed at different process parameters

No.	Laser power P/W	Scanning speed v/（mm·s^-1）	Laser energy density E/（J·mm^-3）	Relative density/%
1	160	1000	48	97.53
2	180	1125		97.95
3	200	1250		99.31
4	220	1375		98.18
5	160	889	54	97.92
6	180	1000		99.75
7	200	1111		99.21
8	220	1222		98.71
9	160	800	60	98.21
10	180	900		99.11
11	200	1000		98.21
12	220	1100		98.25
13	160	727	66	98.48
14	180	818		99.29
15	200	909		99.13
16	220	1000		99.15

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Yao Yansheng, Tang Jianping, Wang Jun, Ge Zhangsen, Zhang Chenglin. Forming Technology and Properties of 316L Stainless Steel by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2021, 58(1): 114006

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