Back
 MSA  Vol.8 No.3 , March 2017
Corrosion Testing of a Heat Treated 316 L Functional Part Produced by Selective Laser Melting
Abstract: Selective Laser Melting (SLM) shows a big potential among metal additive manufacturing (AM) technologies. However, the large thermal gradients and the local melting and solidification processes of SLM result in the presence of a significant amount of residual stresses in the as built parts. These internal stresses will not only affect mechanical properties, but also increase the risk of Stress Corrosion Cracking (SCC). A twister used in an air extraction pump of a condenser to create a swirl in the water, was chosen as a candidate component to be produced by SLM in 316 L stainless steel. Since the main expected damage mechanism of this component in service is corrosion, corrosion tests were carried out on an as-built twister as well as on heat treated components. It was shown that a low temperature heat treatment at 450 had only a limited effect on the residual stress reduction and concomitant corrosion properties, while the internal stresses were significantly reduced when a high temperature heat treatment at 950 was applied. Furthermore, a specific stress corrosion sensitivity test proved to be a useful tool to evaluate the internal stress distribution in a specific component.
Cite this paper: Bruycker, E. , Sistiaga, M. , Thielemans, F. and Vanmeensel, K. (2017) Corrosion Testing of a Heat Treated 316 L Functional Part Produced by Selective Laser Melting. Materials Sciences and Applications, 8, 223-233. doi: 10.4236/msa.2017.83015.
References

[1]   Yadroitsev, I., Gusarov, A., Yadroitsava, I. and Smurov, I. (2010) Single Track Formation in Selective Laser Melting of Metal Powders. Journal of Materials Processing Technology, 210, 1624-1631.
https://doi.org/10.1016/j.jmatprotec.2010.05.010

[2]   Spierings, A.B., Starr, T.L. and Wegener, K. (2013) Fatigue Performance of Additive Manufactured Metallic Parts. Rapid Prototyping Journal, 19, 88-94.

[3]   Zhong, Y., Liu, L., Wikman, S., Cui, D. and Shen, Z. (2016) Intragranular Cellular Segregation Network Structure Strengthening 316L Stainless Steel Prepared by Selective Laser Melting. Journal of Nuclear Materials, 470, 170-178.
https://doi.org/10.1016/j.jnucmat.2015.12.034

[4]   Tolosa, I., Garciandía, F., Zubiri, F., Zapirain, F. and Esnaola, A. (2010) Study of Mechanical Properties of AISI 316 Stainless Steel Processed by Selective Laser Melting, Following Different Manufacturing Strategies. The International Journal of Advanced Manufacturing Technology, 51, 639-647.
https://doi.org/10.1007/s00170-010-2631-5

[5]   Witt, G. and Sehrt, J.T. (2010) Static Strength Analysis of Beam Melted Parts Dependent on Various Influences. 21st Annual International Solid Freeform Fabrication (SFF) Symposium, Austin, 9-11 August 2010, 407-414.

[6]   Riemer, A., Leuders, S., Thöne, M., Richard, H.A., Tröster, T. and Niendorf, T. (2014) On the Fatigue Crack Growth Behavior in 316L Stainless Steel Manufactured by Selective Laser Melting. Engineering Fracture Mechanics, 120, 15-25.
https://doi.org/10.1016/j.engfracmech.2014.03.008

[7]   Montero Sistiaga, M.L., Nardone, S., Hautfenne, C. and Van Humbeeck, J. (2016) Effect of Heat Treatment of 316L Stainless Steel Produced by Selective Laser Melting (SLM). Annual International Solid Freeform Fabrication Symposium, Austin, 8-10 July 2016, 558-565.

[8]   Kovach, C.W. (2000) High-Performance Stainless Steels. Technical Marketing Resources, Inc., Pittsburgh.

[9]   Vrancken, B. (2016) Study of Residual Stresses in Selective Laser Melting. PhD Thesis, KU Leuven, Leuven.

[10]   Mercelis, P. and Kruth, J. (2006) Residual Stresses in Selective Laser Sintering and Selective Laser Melting. Rapid Prototyping Journal, 12, 254-265.
https://doi.org/10.1108/13552540610707013

[11]   Yasa, E. and Kruth, J.-P. (2011) Microstructural Investigation of Selective Laser Melting 316L Stainless Steel Parts Exposed to Laser Re-Melting. Procedia Engineering, 19, 389-395.
https://doi.org/10.1016/j.proeng.2011.11.130

[12]   ASTMG36-94 (2013) Standard Practice for Evaluating Stress-Corrosion-Cracking Resistance of Metals and Alloys in a Boiling Magnesium Chloride Solution. Book of Standards Vol. 03.02.

 
 
Top