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Experimental and numerical investigation of selective laser melting–induced defects in Ti–6Al–4V octet truss lattice material: the role of material microstructure and morphological variations

Published online by Cambridge University Press:  29 April 2020

Asma El Elmi ,
David Melancon ,
Meisam Asgari ,
Lu Liu  and
Damiano Pasini
Asma El Elmi
Affiliation:
Mechanical Engineering Department, McGill University, Montreal, Quebec H3A 0C3, Canada
David Melancon
Affiliation:
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
Meisam Asgari
Affiliation:
School of Engineering and Applied Science, Northwestern University, Evanston, Illinois, USA; and Mechanical Engineering Department, McGill University, Montreal, Quebec H3A 0C3, Canada
Lu Liu
Affiliation:
Mechanical Engineering Department, McGill University, Montreal, Quebec H3A 0C3, Canada
Damiano Pasini*
Affiliation:
Mechanical Engineering Department, McGill University, Montreal, Quebec H3A 0C3, Canada
*
a)Address all correspondence to this author. e-mail: damiano.pasini@mcgill.ca
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Abstract

The remarkable progress in additive manufacturing has promoted the design of architected materials with mechanical properties that go beyond those of conventional solids. Their realization, however, leads to architectures with process-induced defects that can jeopardize mechanical and functional performance. In this work, we investigate experimentally and numerically as-manufactured defects in Ti–6Al–4V octet truss lattice materials fabricated with selective laser melting. Four sets of as-manufactured defects, including surface, microstructural, morphological, and material property imperfections, are characterized experimentally at given locations and orientations. Within the characterized defects, material property and morphological defects are quantified statistically using a combination of atomic force microscopy and micro–computed tomography to generate representative models that incorporate individual defects and their combination. The models are used to assess the sensitivity to as-manufactured defects. Then, the study is expanded by tuning defects amplitude to elucidate the role of the magnitude of as-designed defects on the mechanical properties of the lattice material.

Keywords

cellular (material form)additive manufacturingdefects
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 15: Focus Issue: Additive Manufacturing of Metals: Complex Microstructures and Architecture Design , 14 August 2020 , pp. 1900 - 1912
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Copyright
Copyright © Materials Research Society 2020

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References

References:

Hollister, S.J.: Scaffold design and manufacturing: From concept to clinic. Adv. Mater. 21, 3330–3342 (2009).CrossRefGoogle Scholar
Hollister, S.J. and Murphy, W.L.: Scaffold translation: Barriers between concept and clinic. Tissue Eng., Part B 17, 459–474 (2011).CrossRefGoogle ScholarPubMed
Levine, B.: A new era in porous metals: Applications in orthopaedics. Adv. Eng. Mater. 10, 788–792 (2008).CrossRefGoogle Scholar
Ryan, G., Pandit, A., and Apatsidis, D.P.: Fabrication methods of porous metals for use in orthopaedic applications. Biomaterials 27, 2651–2670 (2006).CrossRefGoogle ScholarPubMed
Harrysson, O.L.A., Cansizoglu, O., Marcellin-Little, D.J., Cormier, D.R., and West, H.A. II: Direct metal fabrication of titanium implants with tailored materials and mechanical properties using electron beam melting technology. Mater. Sci. Eng., C 28, 366–373 (2008).CrossRefGoogle Scholar
Heinl, P., Müller, L., Körner, C., Singer, R.F., and Müller, F.A.: Cellular Ti–6Al–4V structures with interconnected macro porosity for bone implants fabricated by selective electron beam melting. Acta Biomater. 4, 1536–1544 (2008).CrossRefGoogle ScholarPubMed
Mullen, L., Stamp, R.C., Brooks, W.K., Jones, E., and Sutcliffe, C.J.: Selective laser melting: A regular unit cell approach for the manufacture of porous, titanium, bone in‐growth constructs, suitable for orthopedic applications. J. Biomed. Mater. Res., Part B 89, 325–334 (2009).CrossRefGoogle ScholarPubMed
Murr, L.E., Gaytan, S.M., Medina, F., Lopez, H., Martinez, E., Machado, B.I., Hernandez, D.H., Martinez, L., Lopez, M.I., and Wicker, R.B.: Next-generation biomedical implants using additive manufacturing of complex, cellular, and functional mesh arrays. Philos. Trans. R. Soc., A 368, 1999–2032 (2010).CrossRefGoogle ScholarPubMed
Liu, Y.J., Li, S.J., Wang, H.L., Hou, W.T., Hao, Y.L., Yang, R., Sercombe, T.B., and Zhang, L.C.: Microstructure, defects, and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting. Acta Mater. 113, 56–67 (2016).CrossRefGoogle Scholar
Gong, H., Rafi, K., Gu, H., Starr, T., and Stucker, B.: Analysis of defect generation in Ti–6Al–4V parts made using powder bed fusion additive manufacturing processes. Addit. Manuf. 1–4, 87–98 (2014).Google Scholar
Echeta, I., Feng, X., Dutton, B., Piano, S., and Leach, R.: Review of defects in lattice structures manufactured by powder bed fusion. Int. J. Adv. Manuf. Technol. 106, 2649–2668 (2019).CrossRefGoogle Scholar
Tancogne-Dejean, T., Spierings, A.B., and Mohr, D.: Additively-manufactured metallic micro-lattice materials for high specific energy absorption under static and dynamic loading. Acta Mater. 116, 14–28 (2016).CrossRefGoogle Scholar
Ferrigno, A., Di Caprio, F., Borrelli, R., Auricchio, F., and Vigliotti, A.: The mechanical strength of Ti–6Al–4V columns with regular octet microstructure manufactured by electron beam melting. Materialia 5, 100232 (2019).CrossRefGoogle Scholar
Chen, S. and Isaksson, P.: A note on the defect sensitivity of brittle solid foams. Eng. Fract. Mech. 206, 541–550 (2019).CrossRefGoogle Scholar
Chen, S. and Isaksson, P.: An experimental analysis of the defect sensitivity of solid foams. Theor. Appl. Fract. Mech. 96, 768–774 (2018).CrossRefGoogle Scholar
Zhang, B., Li, Y., and Bai, Q.: Defect formation mechanisms in selective laser melting: A review. Chin. J. Mech. Eng. 30, 515–527 (2017).CrossRefGoogle Scholar
Amani, Y., Dancette, S., Delroisse, P., Simar, A., and Maire, E.: Compression behavior of lattice structures produced by selective laser melting: X-ray tomography based experimental and finite element approaches. Acta Mater. 159, 395–407 (2018).CrossRefGoogle Scholar
Dong, Z., Liu, Y., Li, W., and Liang, J.: Orientation dependency for microstructure, geometric accuracy and mechanical properties of selective laser melting AlSi10Mg lattices. J. Alloys Compd. 791, 490–500 (2019).CrossRefGoogle Scholar
Yan, C., Hao, L., Hussein, A., and Raymont, D.: Evaluations of cellular lattice structures manufactured using selective laser melting. Int. J. Mach. Tool Manufact. 62, 32–38 (2012).CrossRefGoogle Scholar
Bagheri, Z.S., Melancon, D., Liu, L., Johnston, R.B., and Pasini, D.: Compensation strategy to reduce geometry and mechanics mismatches in porous biomaterials built with selective laser melting. J. Mech. Behav. Biomed. Mater. 70, 17–27 (2017).CrossRefGoogle ScholarPubMed
Melancon, D., Bagheri, Z.S., Johnston, R.B., Liu, L., Tanzer, M., and Pasini, D.: Mechanical characterization of structurally porous biomaterials built via additive manufacturing: Experiments, predictive models, and design maps for load-bearing bone replacement implants. Acta Biomater. 63, 350–368 (2017).CrossRefGoogle ScholarPubMed
Carlos, D.M.K., Portelaa, M., and Greera, J.R.: Impact of node geometry on the effective stiffness of non-slender three-dimensional truss lattice architectures. Extreme Mech. Lett. 22, 138–148 (2018).Google Scholar
Arabnejad, S., Burnett Johnston, R., Pura, J.A., Singh, B., Tanzer, M., and Pasini, D.: High-strength porous biomaterials for bone replacement: A strategy to assess the interplay between cell morphology, mechanical properties, bone ingrowth, and manufacturing constraints. Acta Biomater. 30, 345–356 (2016).CrossRefGoogle ScholarPubMed
Liu, L., Kamm, P., García-Moreno, F., Banhart, J., and Pasini, D.: Elastic and failure response of imperfect three-dimensional metallic lattices: The role of geometric defects induced by selective laser melting. J. Mech. Phys. Solids 107, 160–184 (2017).CrossRefGoogle Scholar
Ataee, A., Li, Y., Fraser, D., Song, G., and Wen, C.: Anisotropic Ti–6Al–4V gyroid scaffolds manufactured by electron beam melting (EBM) for bone implant applications. Mater. Des. 137, 345–354 (2018).CrossRefGoogle Scholar
Liu, X. and Liang, N.: Effective elastic moduli of triangular lattice material with defects. J. Mech. Phys. Solids 60, 1722–1739 (2012).CrossRefGoogle Scholar
Gross, A., Pantidis, P., Bertoldi, K., and Gerasimidis, S.: Correlation between topology and elastic properties of imperfect truss-lattice materials. J. Mech. Phys. Solids 124, 577–598 (2019).CrossRefGoogle Scholar
Simone, A.E. and Gibson, L.J.: The effects of cell face curvature and corrugations on the stiffness and strength of metallic foams. Acta Mater. 46, 3929–3935 (1998).CrossRefGoogle Scholar
Chen, C., Lu, T.J., and Fleck, N.A.: Effect of imperfections on the yielding of two-dimensional foams. J. Mech. Phys. Solids 47, 2235–2272 (1999).CrossRefGoogle Scholar
Romijn, N.E.R. and Fleck, N.A.: The fracture toughness of planar lattices: Imperfection sensitivity. J. Mech. Phys. Solids 55, 2538–2564 (2007).CrossRefGoogle Scholar
Pasini, D. and Guest, J.K.: Imperfect architected materials: Mechanics and topology optimization. MRS Bull. 44, 766–772 (2019).CrossRefGoogle Scholar
Seiler, P.E., Tankasala, H.C., and Fleck, N.A.: Creep failure of honeycombs made by rapid prototyping. Acta Mater. 178, 122–134 (2019).CrossRefGoogle Scholar
Cuadrado, A., Yánez, A., Martel, O., Deviaene, S., and Monopoli, D.: Influence of load orientation and of types of loads on the mechanical properties of porous Ti6Al4V biomaterials. Mater. Des. 135, 309–318 (2017).CrossRefGoogle Scholar
Sing, S.L., Wiria, F.E., and Yeong, W.Y.: Selective laser melting of lattice structures: A statistical approach to manufacturability and mechanical behavior. Robot. Comput. Integrated Manuf. 49, 170–180 (2018).CrossRefGoogle Scholar
Lin, C-Y., Wirtz, T., LaMarca, F., and Hollister, S.J.: Structural and mechanical evaluations of a topology optimized titanium interbody fusion cage fabricated by selective laser melting process. J. Biomed. Mater. Res., Part A 83A, 272–279 (2007).CrossRefGoogle Scholar
Al-Ketan, O., Rowshan, R., and Abu Al-Rub, R.K.: Topology-mechanical property relationship of 3D printed strut, skeletal, and sheet based periodic metallic cellular materials. Addit. Manuf. 19, 167–183 (2018).Google Scholar
Han, C., Li, Y., Wang, Q., Wen, S., Wei, Q., Yan, C., Hao, L., Liu, J., and Shi, Y.: Continuous functionally graded porous titanium scaffolds manufactured by selective laser melting for bone implants. J. Mech. Behav. Biomed. Mater. 80, 119–127 (2018).CrossRefGoogle ScholarPubMed
Asgari, M., Abi-Rafeh, J., Hendy, G.N., and Pasini, D.: Material anisotropy and elasticity of cortical and trabecular bone in the adult mouse femur via AFM indentation. J. Mech. Behav. Biomed. Mater. 93, 81–92 (2019).CrossRefGoogle ScholarPubMed
Symons, D.D. and Fleck, N.A.: The imperfection sensitivity of isotropic two-dimensional elastic lattices. J. Appl. Mech. 75, 51011–51018 (2008).CrossRefGoogle Scholar
Chen, C., Lu, T.J., and Fleck, N.A.: Effect of inclusions and holes on the stiffness and strength of honeycombs. Int. J. Mech. Sci. 43, 487–504 (2001).CrossRefGoogle Scholar
Simone, A.E.E. and Gibson, L.J.J.: Effects of solid distribution on the stiffness and strength of metallic foams. Acta Mater. 46, 2139–2150 (1998).CrossRefGoogle Scholar
Fleck, N.A. and Qiu, X.: The damage tolerance of elastic–brittle, two-dimensional isotropic lattices. J. Mech. Phys. Solids 55, 562–588 (2007).CrossRefGoogle Scholar
Deshpande, V.S., Ashby, M.F., and Fleck, N.A.: Foam topology: Bending versus stretching dominated architectures. Acta Mater. 49, 1035–1040 (2001).CrossRefGoogle Scholar
Kalamkarov, A.L., Andrianov, I.V., and Danishevs'kyy, V.V.: Asymptotic homogenization of composite materials and structures. Appl. Mech. Rev. 62, 030802 (2009).CrossRefGoogle Scholar
Hollister, S.J. and Kikuchi, N.: A comparison of homogenization and standard mechanics analyses for periodic porous composites. Comput. Mech. 10, 73–95 (1992).CrossRefGoogle Scholar
Wallach, J.C. and Gibson, L.J.: Defect sensitivity of a 3D truss material. Scr. Mater. 45, 639–644 (2001).CrossRefGoogle Scholar
Dallago, M., Winiarski, B., Zanini, F., Carmignato, S., and Benedetti, M.: On the effect of geometrical imperfections and defects on the fatigue strength of cellular lattice structures additively manufactured via selective laser melting. Int. J. Fatigue 124, 348–360 (2019).CrossRefGoogle Scholar
Dallago, M., Benedetti, M., Luchin, V., and Fontanari, V.: Orthotropic elastic constants of 2D cellular structures with variously arranged square cells: The effect of filleted wall junctions. Int. J. Mech. Sci. 122, 63–78 (2017).CrossRefGoogle Scholar
Queheillalt, D.T.D., Deshpande, V.V.S., and Wadley, H.N.G.H.: Truss waviness effects in cellular lattice structures. J. Mech. Mater. Struct. 2, 1657–1675 (2007).CrossRefGoogle Scholar
Gibson, L.J.: The Elastic and Plastic Behaviour of Cellular Materials. Doctoral thesis. University of Cambridge (1981).Google Scholar
Ahn, S.J., Rauh, W., and Warnecke, H-J.: Least-squares orthogonal distances fitting of circle, sphere, ellipse, hyperbola, and parabola. Pattern Recogn. 34, 2283–2303 (2001).CrossRefGoogle Scholar
Le, C.V., Nguyen, P.H., Askes, H., and Pham, D.C.: A computational homogenization approach for limit analysis of heterogeneous materials. Int. J. Numer. Methods Eng. 112, 1381–1401 (2017).CrossRefGoogle Scholar
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