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Mechanical properties of 316L stainless steel samples fabricated by selective laser melting and comparison with other manufacturing methods

Document Type : Research paper

Authors

1 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 11365-8486, Tehran – Iran.

2 Researcher of AEOI, Tehran – Iran

Abstract

Selective laser melting (SLM) is an additive manufacturing technique in which a laser beam with a high energy density is used to melt a metal powder substrate. Although this technique has several advantages, including the possibility of fabricating complex metal components quickly, there are concerns about the mechanical properties of the parts produced by the SLM method. This is study aims to ensure the achievement of acceptable mechanical properties including yield stress, tensile strength, and elongation percentage compared to conventional manufacturing methods. For this purpose, samples of 316L stainless steel were printed using the SLM machine. These samples and samples of annealed 316L bar were tested under same conditions and by the same equipment. Despite the large differences in microscopic structure, no significant differences were observed in mechanical properties. Also, the obtained results were compared with the results related to the sample made by the DLD additive manufacturing method, which is similar to SLM in terms of energy source and raw materials. The result represents that the mechanical strength and microhardness of the sample produced by the SLM technique are higher than the other samples, and the elongation percentage is within the desirable range. The yield stress, tensile strength, and elongation are respectively 595Mpa, 696Mpa, and 34.5%, all of which are within the acceptable range required by the standards for such samples. The investigation of the microstructure shows a complete austenitic cellular structure without considerable solidification defects. Overall, the SLM additive manufacturing is a reliable process to produce 316L stainless steel parts in terms of mechanical properties.

Keywords

References
1.   B. Zhang, Y. Li and Q. Bai, Defect Formation Mechanisms in Selective Laser Melting: A Review, Chin. J. Mech. Eng. 30: pp. 515–527, (2017).
 
2. T.S. Srivatsan, T.S. Sudarshan, Additive MAnufActuring Innovations, Advances, and Applications, Taylor and Francis group, 2016
 
3.   L. Thijs et al. A study of the microstructural evolution during selective laser melting of Ti–6Al–4V, Acta Materialia. 58: pp. 3303–3312, (2010).
 
4.   H. Khalid Rafi, Thomas L. Starr and Brent E. Stucker, A comparison of the tensile, fatigue, and fracture behavior of Ti–6Al–4V and 15-5 PH stainless steel parts made by selective laser melting, Int J Adv Manuf Technol. 69: pp. 1299-1309, (2013).
 
5.     Luke N. Carter, Moataz M. Attallah and Roger C. Reed, Laser powder bed fabrication of nickel-base superalloys: influence of parameters; characterisation, quantification and mitigation of cracking, In 12th International Symposium on Superalloys, Pennsylvania, (USA, 2012).
 
6.  Q. Jia, D. Gu, Selective laser melting additive manufacturing of Inconel 718 superalloy parts: Densification, microstructure and properties, Journal of Alloys and Compounds. 585: pp. 713–721, (2014).
 
7.   Jiang Bi et al. Densification, microstructure and mechanical properties of an Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy printed by selective laser melting, Materials Science & Engineering A, 774: pp. 138931, (2020).
 
8.   Pei Wanga et al. Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting, Materials Science & Engineering A, 711: pp. 562–570, (2018).
 
9.  P.Wang et al.  Microstructure and mechanical properties of Al-Cu alloys fabricated by selective laser melting of powder mixtures, Journal of Alloys and Compounds, 735: pp. 2263-2266, (2018).
 
10.   Ruidi Li et al. 316L Stainless Steel with Gradient Porosity Fabricated by Selective Laser Melting, Journal of Materials Engineering and Performance, 19: pp. 666-671, (2010).
 
11. I. Yadroitsev et al. Single-track formation in selective laser melting of metal powders, Journal of Materials Processing Technology, 210: pp. 1624–1631, (2010).
 
12.   E. Liverani et al. Effect of selective laser melting (SLM) process parameters on microstructure and mechanical properties of 316L austenitic stainless steel, Journal of Materials Processing Technology, 249: pp. 255-263, (2017).
 
13.   Taban Larimian et al. Effect of energy density and scanning strategy on densification, microstructure and mechanical properties of 316L stainless steel processed via selective laser melting, Materials Science and Engineering: A, 770: pp. 138455, (2020).
 
14.    Jiangwei Liu et al. Effect of scanning speed on the microstructure and mechanical behavior of 316L stainless steel fabricated by selective laser melting, Materials & Design. 186: pp. 108355, (2020).
 
15.  J. A. Cherry et al. Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting, The International Journal of Advanced Manufacturing Technology. 76(5): pp. 869-879, (2015).
 
16.   Shi Wentian et al. Properties of 316L formed by a 400W power laser Selective Laser melting with 250μm layer thickness, Powder Technology. 360: pp. 151-164, (2020).
 
17.   G. Miranda et al. Predictive models for physical and mechanical properties of 316L stainless steel produced by selective laser melting, Materials Science and Engineering: A, 657: pp. 43-56, (2016).
 
18.    M. O. Sklyar et al. Microstructure of 316L stainless steel components produced by direct laser deposition, Steel in Translation. 46: pp. 883-887, (2016).
 
19.   L. Hitzler, M. Merkel, A Review of Metal Fabricated with Laser- and Powder-Bed Based Additive Manufacturing Techniques: Process,Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector. Advanced engineering materials, (2018).
 
20.  D. Wang, et al. Investigation of crystal growth mechanism during selective laser melting and mechanical property characterization of 316L, Materials and Design, 100: pp. 291–299, (2016).
Journal of Nuclear Research and Applications
Volume 2, Issue 1 - Serial Number 2
January 2022
Pages 8-17
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