Browse > Article
http://dx.doi.org/10.14775/ksmpe.2021.20.06.059

Deposition Characteristics and Mechanical Properties of Stainless Steel 316L Fabricated via Directed Energy Deposition  

Yang, Seung-weon (Department of Ocean Advanced Materials convergence Eng., Korea Maritime & Ocean University)
Lee, Hyub (Intelligent Manufacturing R&D Department, Korea Institute of Industrial technology(KITECH))
Shim, Do-Sik (Department of Ocean Advanced Materials convergence Eng., Korea Maritime & Ocean University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.6, 2021 , pp. 59-69 More about this Journal
Abstract
Directed energy deposition (DED) is an additive manufacturing technology involving a focused high-power laser or electron beam propagating over the substrate, resulting in melt pool formation while simultaneously supplying metal powder to the melt pool area to deposit the material. DED is performed to repair and strengthen parts in various applications, as it can be easily integrate local area cladding and cross-material deposition. In this study, we characterize stainless steel 316 L parts fabricated via DED based on various deposition conditions and geometries to widen the application of DED. The deposition characteristics are investigated by varying the laser power and powder feed rate. Multilayer deposition with a laser power of 362 W and a powder feed rate of 6.61 g/min indicate a height closest to the design value while affording high surface quality. The microhardness of the specimen increases from the top to the bottom of the deposited area. Tensile tests of specimens with two different deposition directions indicate that horizontally long specimens with respect to a substrate demonstrate a higher ultimate tensile strength and yield strength than vertically long specimens with lower elongation.
Keywords
Directed Energy Deposition(DED); Stainless Steel 316L; Hardness; Tensile Properties; Microstructure;
Citations & Related Records
연도 인용수 순위
  • Reference
1 "Development of a High Performance Powder sMaterials for Metal 3D Printing",(2017) http://www.ndsl.kr/ndsl/commons/util/ndslOriginalView.do?dbt=TRKO&cn=TRKO201800002124(accessed 17, Dec., 2017)
2 Seo, J. Y., Yoon, H. S., Lee, K. Y. and Shim. D. S., "Study on Effects of Direct Laser Melting Process Parameters on Deposition Characteristics of ALSi12 powders," Transactions of Materials Processing, Vol. 27, No. 5, pp. 314-322, 2018.   DOI
3 Liu, Q., Wang, Y., Zheng, H., Tang, K., Li, H., & Gong, S., "TC17 titanium alloy laser melting deposition repair process and properties," Optics & Laser Technology, Vol. 82, pp. 1-9, 2016.   DOI
4 Lee, I. H., Kim, H. C., and Ahn, D. G., "Korean Terminologies for Additive Manufacturing according to the ISO/ASTM 52900 Standard," Journal of the Korean Society for Precision Engineering, Vol. 37, No. 12, pp. 929-936, 2020.   DOI
5 Hwang, J. H., Shin, S. S., Lee, J. H., Kim, S. W. and Kim, H. D., "A Study on Surface and Cross-section Properties Depending on the Process Parameters of Laser Deposition with Metal Powder (SUS 316L and Inconel 718)," Journal of Welding and Joining, Vol. 35, No. 3, pp. 28-34, 2017   DOI
6 Lee, T. H., Kang, M. J., Oh, J. H., Kam, D. H., "Parametric Study of STS 316L Deposition with Arc and Wire Additive Manufacturing," Journal of Welding and Joining, Vol. 36, No. 3, pp. 23-30, 2018.
7 Ro, J. S., Sanseong, C. H., Umarov, R., Pyun, Y. S. and Amanov, A., "A Study on the Effect of UNSM Treatment on the Mechanical and Tribological Properties of STS 316L Printed by Selective Laser Melting," Tribology and Lubricants, Vol. 34, No. 6, pp. 270-278, 2018.   DOI
8 Oh, D. G., Kang, Y. J., Kim, G. D., Park,, S. Y., and Song, S. W., "Effect of HIP Process and Fatigue Performance for SS 316L Manufactured by PBF," Jorunal of Welding and Joining, Vol. 38, No. 1, pp. 469-474. 2020.   DOI
9 Park, S. H. and Shim, D. S., "Additive Manufacuting Tehcnology & Engineering," Hongpub, pp. 215, 2018.
10 Oh, W. J., Son, Y., Son, J. Y., Shin, G. W. and Shim. D. S., "Effect of Groove Shapes on Mechanical Properties of STS316L Repaired by Direct Energy Deposition," Jorunal of Korea society For Technology of Plasticity, Vol. 29, No. 2, pp. 103-112, 2020.