Development and processability of AISI S2 tool steel by laser powder bed fusion

Development and processability of AISI S2 tool steel by laser powder bed fusion

SAGGIONETTO Enrico, FILIPPI Elena, DEDRY Olivier, TCHUINDJANG Jérôme T., MERTENS Anne

Abstract. Nowadays, the advantages of Laser Powder Bed Fusion (LPBF) technology attract both industry and researchers. Indeed, it is possible to build up complex geometrical parts with higher mechanical properties than those obtained by conventional methods. However, LPBF involves complex phenomena due to the high heating and cooling rates that lead to out-of-equilibrium conditions. For this reason, few metal alloys are easily processable up to now. Nevertheless, research on new steels by LPBF has been growing in recent years, in particular, regarding the development of tool steels. This work thus focuses on the development of the tool steel AISI S2 by LPBF. The process map has been investigated by varying the laser power from 100 to 250 W and the scan speed from 400 to 2000 mm/s. By combining surface analysis by means of profilometer observations, density measurements by pycnometry, defects characterization and quantification and investigations on the melt pool morphology, the best process window is selected to have fully dense, defect-free parts. Furthermore, this study allows to have comprehensive insights on the effect of the parameters on the type of defects generated during the manufacturing.

Keywords
Additive Manufacturing, Laser Powder Bed Fusion, Tool Steel, Process Map

Published online 4/19/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: SAGGIONETTO Enrico, FILIPPI Elena, DEDRY Olivier, TCHUINDJANG Jérôme T., MERTENS Anne, Development and processability of AISI S2 tool steel by laser powder bed fusion, Materials Research Proceedings, Vol. 28, pp 41-48, 2023

DOI: https://doi.org/10.21741/9781644902479-5

The article was published as article 5 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] S. Gorsse, C. Hutchinson, M. Gouné, R. Banerjee, Additive manufacturing of metals: a brief review of the characteristic microstructures and properties of steels, Ti-6Al-4V and high-entropy alloys, Sci. Technol. Adv. Mater. 18 (2017) 584-610. https://doi.org/10.1080/14686996.2017.1361305
[2] B. Zhang, Y. Li, Q. Bai, Defect Formation Mechanisms in Selective Laser Melting: A Review, Chinese J. Mech. Eng. English Ed. 30 (2017) 515-527. https://doi.org/10.1007/s10033-017-0121-5
[3] S. Chowdhury, N. Yadaiah, C. Prakash, S. Ramakrishna, S. Dixit, L.R. Gupta, D. Buddhi, Laser powder bed fusion: a state-of-the-art review of the technology, materials, properties & defects, and numerical modelling, J. Mater. Res. Technol. 20 (2022) 2109 -2172. https://doi.org/10.1016/j.jmrt.2022.07.121
[4] D. Wang, S. Wu, S. Mai, Y. Yang, Y. Liu, C. Song, Mechanisms and characteristics of spatter generation in SLM processing and its effect on the properties, Mater. Des. 117 (2017) 121 -130. https://doi.org/10.1016/j.matdes.2016.12.060
[5] J. Platl, H. Leitner, C. Turk, A.G. Demir, B. Previtali, R. Schnitzer, Defects in a Laser Powder Bed Fused Tool Steel, Adv. Eng. Mater. 23 (2021) 1-11. https://doi.org/10.1002/adem.202000833.
[6] M. A. Ryder, C.J. Montgomery, M.J. Brand, J.S. Carpenter, P.E. Jones, A.G. Spangenberger, D.A. Lados, Melt Pool and Heat Treatment Optimization for the Fabrication of High-Strength and High-Toughness Additively Manufactured 4340 Steel, J. Mater. Eng. Perform. 30 (2021) 5426-5440. https://doi.org/10.1007/s11665-021-05836-8
[7] V. Gunenthiram, P. Peyre, M. Schneider, M. Dal, F. Coste, R. Fabbro, Analysis of laser -melt pool -powder bed interaction during the selective laser melting of a stainless steel, J. Laser Appl. 29 (2017) 022303. https://doi.org/10.2351/1.4983259
[8] Q. Chen, Y. Zhao, S. Strayer, Y. Zhao, K. Aoyagi, Y. Koizumi, A. Chiba, W. Xiong, A.C. To, Elucidating the effect of preheating temperature on melt pool morphology variation in Inconel 718 laser powder bed fusion via simulation and experiment, Addit. Manuf. 37 (2021) 101642. https://doi.org/10.1016/j.addma.2020.101642
[9] Y. He, M. Zhong, N. Jones, J. Beuth, B. Webler, The Columnar-to-Equiaxed Transition in Melt Pools During Laser Powder Bed Fusion of M2 Steel, Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 52 (2021) 4206-4221. https://doi.org/10.1007/s11661-021-06380-9
[10] R. Cunningham, C. Zhao, N. Parab, C. Kantzos, J. Pauza, K. Fezzaa, T. Sun,
A.D. Rollett, Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging, Science (80-. ) 363 (2019) 849 -852. https://doi.org/10.1126/science.aav4687
[11] A. L. Strauch, V. Uhlewinkel, M. Steinbacher, F. Großwendt, A. Röttger, A.B. Chehreh, F. Walther, R. Fechte-Heinen, Comparison of the processability and influence on the microstructure of different starting powder blends for laser powder bed fusion of a Fe3.5 Si1.5 C alloy, Metals 11 (2021) 1107. https://doi.org/10.3390/met11071107
[12] J. Saewe, N. Carstensen, P. Kürnsteiner, E.A. Jägle, J.H. Schleifenbaum, Influence of increased carbon content on the processability of high-speed steel HS6-5-3-8 by laser powder bed fusion, Addit. Manuf. 46 (2021) 102125. https://doi.org/10.1016/j.addma.2021.102125
[13] W. Hearn, E. Hryha, Effect of Carbon Content on the Processability of Fe-C Alloys Produced by Laser Based Powder Bed Fusion, Front. Mater. 8 (2022) 1-10. https://doi.org/10.3389/fmats.2021.800021
[14] M.A. Taha, A.F. Yousef, K.A. Gany, H.A. Sabour, On selective laser melting of ultra high carbon steel: Effect of scan speed and post heat treatment, Materwiss. Werksttech. 43 (2012) 913-923. https://doi.org/10.1002/mawe.201200030
[15] J. Kunz, M.L. Köhler, S. Herzog, A. Kaletsch, C. Broeckmann, Influence of an Increasing Alloying Content on the Microstructure of a High-Speed Steel in the Laser-Powder Bed Fusion Process, Steel Res. Int. 92 (2021), https://doi.org/10.1002/srin.202100438
[16] X. Kang, S. Dong, H. Wang, S. Yan, X. Liu, H. Ren, Effect of thermal cycle on microstructure evolution and mechanical properties of selective laser melted low-alloy steel, Materials 12 (2019) 1-15. https://doi.org/10.3390/ma12213625
[17] J.J.S. Dilip, G.D.J. Ram, T.L. Starr, B. Stucker, Selective laser melting of HY100 steel: Process parameters, microstructure and mechanical properties, Addit. Manuf. 13 (2017) 49-60. https://doi.org/10.1016/j.addma.2016.11.003
[18] W. Hearn, K. Lindgren, J. Persson, E. Hryha, In situ tempering of martensite during laser powder bed fusion of Fe-0.45C steel, Materialia 23 (2022) 101459. https://doi.org/10.1016/j.mtla.2022.101459
[19] W. Wang, S. Kelly, A Metallurgical Evaluation of the Powder-Bed Laser Additive Manufactured 4140 Steel Material, JOM 68 (2016) 869 -875. https://doi.org/10.1007/s11837-015-1804-y
[20] J. Damon, R. Koch, D. Kaiser, G. Graf, S. Dietrich, V. Schulze, Process development and impact of intrinsic heat treatment on the mechanical performance of selective laser melted AISI 4140, Addit. Manuf. 28 (2019) 275-284. https://doi.org/10.1016/j.addma.2019.05.012
[21] E. Jelis, M.R. Hespos, N.M. Ravindra, Process Evaluation of AISI 4340 Steel Manufactured by Laser Powder Bed Fusion, J. Mater. Eng. Perform. 27 (2018) 63-71. https://doi.org/10.1007/s11665-017-2989-8
[22] H. Zheng, H. Li, L. Lang, S. Gong, Y. Ge, Effects of scan speed on vapor plume behavior and spatter generation in laser powder bed fusion additive manufacturing, J. Manuf. Process. 36 (2018) 60 -67. https://doi.org/10.1016/j.jmapro.2018.09.011
[23] Y. Huang et al., Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing, Nat. Commun. 13 (2022) 1 -11. https://doi.org/10.1038/s41467-022-28694-x