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Microstructure and Hardness Distribution of Laser Powder Bed Fusion-Produced AISI 2507 Super Duplex Stainless Steel

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Abstract:

This study investigated the impact of as-printed and heat-treated additively produced 2507 super duplex stainless steel (also known as SDSS) on microstructure and hardness distribution. Optical microscopy was used to examine the phase transformations of the steel during the as-printed (untreated) and solution-annealed treatment stages of samples. The relationship between microstructure and hardness distribution (center and edge) was studied. Because the LPBF process cools rapidly, the SDSS shows that the main phase in as-printed samples is ferrite, with 5% austenite. The fully balanced microstructure is forming when the solution annealing is performed, with austenite content about 52%. The hardness of SDSS is strictly related to the material microstructure, where the fully ferritic structure shows higher hardness 50.16–46.18 HRC, while the balanced duplex microstructure reveals lower values 34.58–32.26 HRC.

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Periodical:

Defect and Diffusion Forum (Volume 448)

Pages:

125-130

DOI:

https://doi.org/10.4028/p-gmBT5y

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Online since:

March 2026

Authors:

Mengistu Jemberu Dagnaw*, Zbigniew Brytan, Dominik Cimbala, Vladimír Simkulet, Sichale Worku Fita

Keywords:

AISI 2507, Hardness Distribution, LPBF, Microstructure, SDSS

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] Y. Bai, C. Zhao, J. Yang, R. Hong, C. Weng, H. Wang, Microstructure and machinability of selective laser melted high-strength maraging steel with heat treatment, J. Mater. Process. Technol., 288 (2021) 116906.

DOI: 10.1016/j.jmatprotec.2020.116906

Google Scholar

[2] Y. Kaynak, O. Kitay, Porosity, surface quality, microhardness and microstructure of selective laser melted 316L stainless steel resulting from finish machining, J. Manuf. Mater. Process., 2 (2018) 36.

DOI: 10.3390/jmmp2020036

Google Scholar

[3] J. Charles, P. Chemelle, The history of duplex developments, nowadays DSS properties and duplex market future trends, World Iron Steel, 6 (2011) 1-21.

Google Scholar

[4] J. Charles, P. Chemelle, The history of duplex developments, nowadays DSS properties and duplex market future trends, World Iron Steel, 1 (2012) 46-57.

Google Scholar

[5] Osprey® 2507 super-duplex stainless steel for additive manufacturing, Datasheet, Available: https://www.additive.sandvik/en/super-duplex/super-duplex-powder-for-additive-manufacturing/.

DOI: 10.1016/j.addlet.2024.100204

Google Scholar

[6] J.S. Keist, T.A. Palmer, Development of strength-hardness relationships in additively manufactured titanium alloys, Mater. Sci. Eng. A, 693 (2017) 214-224.

DOI: 10.1016/j.msea.2017.03.102

Google Scholar

[7] H. Attar, S. Ehtemam-Haghighi, D. Kent, I.V. Okulov, H. Wendrock, M. Bönisch, A.S. Volegov, M. Calin, J. Eckert, M.S. Dargusch, Nanoindentation and wear properties of Ti and Ti-TiB composite materials produced by selective laser melting, Mater. Sci. Eng. A, 688 (2017) 20-26.

DOI: 10.1016/j.msea.2017.01.096

Google Scholar

[8] J.S. Zuback, T. DebRoy, The hardness of additively manufactured alloys, Materials, 11 (2018) 2070.

DOI: 10.3390/ma11112070

Google Scholar

[9] F. Cao, T. Zhang, M.A. Ryder, D.A. Lados, A review of the fatigue properties of additively manufactured Ti-6Al-4V, JOM, 70 (2018) 349-357.

DOI: 10.1007/s11837-017-2728-5

Google Scholar

[10] Y. Kok, X.P. Tan, P. Wang, M. Nai, N.H. Loh, E. Liu, S.B. Tor, Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review, Mater. Des., 139 (2018) 565-586.

DOI: 10.1016/j.matdes.2017.11.021

Google Scholar

[11] D. Agius, K.I. Kourousis, C. Wallbrink, A review of the as-built SLM Ti-6Al-4V mechanical properties towards achieving fatigue resistant designs, Metals, 8 (2018) 75.

DOI: 10.3390/met8010075

Google Scholar

[12] S.M. Yusuf, N. Gao, Influence of energy density on metallurgy and properties in metal additive manufacturing, Mater. Sci. Technol., 33 (2017) 1269-1289.

DOI: 10.1080/02670836.2017.1289444

Google Scholar

[13] M. Easton, M. Qian, A. Prasad, D. StJohn, Recent advances in grain refinement of light metals and alloys, Curr. Opin. Solid State Mater. Sci., 20 (2016) 13-24.

DOI: 10.1016/j.cossms.2015.10.001

Google Scholar

[14] P. Collins, D. Brice, P. Samimi, I. Ghamarian, H. Fraser, Microstructural control of additively manufactured metallic materials, Annu. Rev. Mater. Res., 46 (2016) 63-91.

DOI: 10.1146/annurev-matsci-070115-031816

Google Scholar

[15] K. Derekar, A review of wire arc additive manufacturing and advances in wire arc additive manufacturing of aluminium, Mater. Sci. Technol., 34 (2018) 1-22.

DOI: 10.1080/02670836.2018.1455012

Google Scholar

[16] H. Shipley, D. McDonnell, M. Culleton, R. Lupoi, G. O'Donnell, D. Trimble, Optimisation of process parameters to address fundamental challenges during selective laser melting of Ti-6Al-4V: A review, Int. J. Mach. Tools Manuf., 128 (2018) 1-20.

DOI: 10.1016/j.ijmachtools.2018.01.003

Google Scholar

[17] L. Hitzler, M. Merkel, W. Hall, A. Öchsner, 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, Adv. Eng. Mater., 20 (2018) 1700658.

DOI: 10.1002/adem.201700658

Google Scholar

[18] L.C. Zhang, Y. Liu, S. Li, Y. Hao, Additive manufacturing of titanium alloys by electron beam melting: A review, Adv. Eng. Mater., 20 (2018) 1700842.

DOI: 10.1002/adem.201700842

Google Scholar

[19] B. Song, X. Zhao, S. Li, C. Han, Q. Wei, S. Wen, J. Liu, Y. Shi, Differences in microstructure and properties between selective laser melting and traditional manufacturing for fabrication of metal parts: A review, Front. Mech. Eng., 10 (2015) 111-125.

DOI: 10.1007/s11465-015-0341-2

Google Scholar

[20] N. Shamsaei, A. Yadollahi, L. Bian, S.M. Thompson, An overview of Direct Laser Deposition for additive manufacturing; Part II: Mechanical behaviour, process parameter optimization and control, Addit. Manuf., 8 (2015) 12-35.

DOI: 10.1016/j.addma.2015.07.002

Google Scholar

[21] B. Wu, Z. Pan, D. Ding, D. Cuiuri, H. Li, J. Norrish, A review of the wire arc additive manufacturing of metals: Properties, defects and quality improvement, J. Manuf. Process., 35 (2018) 127-139.

DOI: 10.1016/j.jmapro.2018.08.001

Google Scholar

[22] 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 (1) (2017) 584-610.

DOI: 10.1080/14686996.2017.1361305

Google Scholar

[23] Karlsson, M. Thuvander, S. Wessman, Microstructural evolution and mechanical performance of super duplex stainless steel produced by laser powder bed fusion, Mater. Des., 192 (2020) 108728.

Google Scholar

[24] Z. Sun, X. Tan, S.B. Tor, W.Y. Yeong, Selective laser melting of stainless steel 316L with low porosity and high build rates, Mater. Des., 104 (2019) 197-204.

DOI: 10.1016/j.matdes.2016.05.035

Google Scholar

[25] J.S. Zuback, T. DebRoy, The hardness of additively manufactured alloys, Materials, 11 (2018) 2070.

DOI: 10.3390/ma11112070

Google Scholar

[26] H. Li, J. Ma, G. Li, W. Zhang, X. Bao, Y. Shi, Effect of solution annealing time on the microstructure and mechanical properties of selective-laser-melted 2205 duplex stainless steel, Crystals, 14 (2024) 229.

DOI: 10.3390/cryst14030229

Google Scholar

[27] J. Karlsson, M. Thuvander, S. Wessman, Microstructural evolution and mechanical performance of super duplex stainless steel produced by laser powder bed fusion, Mater. Des., 192 (2020) 108728.

Google Scholar

[28] Z. Sun, X. Tan, S.B. Tor, W.Y. Yeong, Selective laser melting of stainless steel 316L with low porosity and high build rates, Mater. Des., 104 (2016) 197-204.

DOI: 10.1016/j.matdes.2016.05.035

Google Scholar