The role of powder layer thickness on the quality of SLM printed parts

• Autorzy: Nguyen Q. B. , Luu D. N. , Nai S. M. L. , Zhu Z. , Chen Z. , Wei J.

Identyfikatory

DOI

10.1016/j.acme.2018.01.015

• Języki publikacji: EN

Abstrakty

EN

Achieving good mechanical properties as well as the dimensional accuracy and the smooth surface quality of selective laser melting printed parts with minimal post treatments are essential in additive manufacturing. In the present study, Inconel 718 samples with different powder layer thickness (20, 30, 40 and 50 μm) were additively fabricated using 3D Systems ProX-300 machine. The results reveal that the lower the layer thickness, the denser and good dimensional accuracy were achieved. Marginally higher mechanical properties and microhardness were also obtained at the lower thickness while the failure strain was still high. This can be explained through significant change in the microstructure due to different cooling rate and thermal cycles. In addition, the formation of ɤ′ and ɤ″ intermetallic phases, which were well distributed in the matrix and grain boundaries, during heating/cooling, gave rise in the strengths. Fractography shows the plastic deformation band due to work hardening and the crack initiation sites at sub-micro/micro pores, lack of fusion areas and the boundary of unmelted particles. The study would guide engineers balance their options between the production rate and the building parts’ quality.

Słowa kluczowe

EN

additive manufacturing; inconel; layer thickness; selective laser melting

PL

topienie laserowe; odkształcenie plastyczne; mikrostruktura

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 18, no. 3
• Strony: 948--955
• Opis fizyczny: Bibliogr. 22 poz., rys., tab., wykr.

Twórcy

autor

Nguyen Q. B.

• Singapore Institute of Manufacturing Technology, 73 Nanyang Dr, Singapore 637662, Singapore

autor

Luu D. N.

• Nanyang Technological University, 50 Nanyang Ave, 639798 Singapore, Singapore

autor

Nai S. M. L.

• Singapore Institute of Manufacturing Technology, 73 Nanyang Dr, Singapore 637662, Singapore

autor

Zhu Z.

• Singapore Institute of Manufacturing Technology, 73 Nanyang Dr, Singapore 637662, Singapore

autor

Chen Z.

• Nanyang Technological University, 50 Nanyang Ave, 639798 Singapore, Singapore

autor

Wei J.

• Singapore Institute of Manufacturing Technology, 73 Nanyang Dr, Singapore 637662, Singapore

Bibliografia

• [1] M.K. Thompson, G. Moroni, T. Vaneker, G. Fadel, R.I. Campbell, I. Gibson, A. Bernard, J. Schulz, P. Graf, B. Ahuja, F. Martina, Design for additive manufacturing: trends, opportunities, considerations, and constraints, CIRP Ann. Manufact. Technol. 65 (2016) 737–760.
• [2] W.E. Frazier, Metal additive manufacturing: a review, J. Mater. Eng. Perform. 23 (2014) 1917–1928.
• [3] D. Herzog, V. Seyda, E. Wycisk, C. Emmelmann, Additive manufacturing of metals, Acta Mater. 117 (2016) 371–392.
• [4] H. Helmer, A. Bauereiß, R.F. Singer, C. Körner, Grain structure evolution in Inconel 718 during selective electron beam melting, Mater. Sci. Eng. A 668 (2016) 180–187.
• [5] L.N. Carter, C. Martin, P.J. Withers, M.M. Attallah, The influence of the laser scan strategy on grain structure and cracking behaviour in SLM powder-bed fabricated nickel superalloy, J. Alloys Compd. 615 (2014) 338–347.
• [6] J. Kundin, L. Mushongera, H. Emmerich, Phase-field modeling of microstructure formation during rapid solidification in Inconel 718 superalloy, Acta Mater. 95 (2015) 343–356.
• [7] M. Sadowski, L. Ladani, W. Brindley, J. Romano, Optimizing quality of additively manufactured Inconel 718 using powder bed laser melting process, Addit. Manufact. 11 (2016) 60–70.
• [8] Q. Jia, D. Gu, Selective laser melting additive manufacturing of Inconel 718 superalloy parts: densification, microstructure and properties, J. Alloys Compd. 585 (2014) 713–721.
• [9] J. Cao, F. Liu, X. Lin, C. Huang, J. Chen, W. Huang, Effect of overlap rate on recrystallization behaviors of Laser Solid Formed Inconel 718 superalloy, Optics Laser Technol. 45 (2013) 228–235.
• [10] S. Marimuthu, A. Triantaphyllou, M. Antar, D. Wimpenny, H. Morton, M. Beard, Laser polishing of selective laser melted components, Int. J. Mach. Tools Manufact. 95 (2015) 97–104.
• [11] B.S. Yilbas, H. Ali, N. Al-Aqeeli, C. Karatas, Laser treatment of Inconel 718 alloy and surface characteristics, Optics Laser Technol. 78 (2016) 153–168.
• [12] V.S. Sufiiarova, A.A. Popovicha, I.A.P.E.V. Borisova, D.V. Masayloa, A.V. Orlov, The effect of layer thickness at selective laser melting, Proc. Eng. 174 (2017) 126–132.
• [13] Q.B. Nguyen, M.L.S. Nai, Z. Zhu, C.-N. Sun, J. Wei, W. Zhou, Characteristics of inconel powders for powder-bed additive manufacturing, Engineering 3 (2017) 695–700.
• [14] J.-P. Choi, G.-H. Shin, S. Yang, D.-Y. Yang, J.-S. Lee, M. Brochu, J.-H. Yua, Densification and microstructural investigation of Inconel 718 parts fabricated by selective laser melting, Powder Technol. 310 (2017) 60–66.
• [15] J.C. Fox, S.P. Moylan, B.M. Lane, Effect of process parameters on the surface roughness of overhanging structures in laser powder bed fusion additive manufacturing, Proc. CIRP 45 (2016) 131–134.
• [16] J. Strößner, M. Terock, U. Glatzel, Mechanical and microstructural investigation of nickel-based superalloy IN718 manufactured by selective laser melting (SLM), Adv. Eng. Mater. 17 (2015) 1099–1105.
• [17] K. Kulawik, P.A. Buffat, A. Kruk, A.M. Wusatowska-Sarnek, A. Czyrska-Filemonowicz, Imaging and characterization of and nanoparticles in Inconel 718 by EDX elemental mapping and FIB–SEM tomography, Mater. Charact. 100 (2015) 74–80.
• [18] E. Chlebus, K. Gruber, B. Kuźnicka, J. Kurzac, T. Kurzynowski, Effect of heat treatment on the microstructure and mechanical properties of Inconel 718 processed by selective laser melting, Mater. Sci. Eng. A 639 (2015) 647–655.
• [19] K.N. Amato, S.M. Gaytan, L.E. Murr, E. Martinez, P.W. Shindo, J. Hernandez, S. Collins, F. Medina, Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting, Acta Mater. 60 (2012) 2229–2239.
• [20] T. Trosch, J. Strößner, R. Völkl, U. Glatzel, Microstructure and mechanical properties of selective laser melted Inconel 718 compared to forging and casting, Mater. Lett. 164 (2016) 428–431.
• [21] S. Raghavan, B. Zhang, P. Wang, C.-N. Sun, M.L.S. Nai, T. Li, J. Wei, Effect of different heat treatments on the microstructure and mechanical properties in selective laser melted INCONEL 718 alloy, Mater. Manufact. Process. (2016) 1–8.
• [22] V.A. Popovich, E.V. Borisov, A.A. Popovich, V.S. Sufiiarov, D.V. Masaylo, L. Alzina, Functionally graded Inconel 718 processed by additive manufacturing: crystallographic texture, anisotropy of microstructure and mechanical properties, Mater. Des. 114 (2017) 441–449.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019)