Topology-driven compressive behavior of Inconel 718 lattice structures with Z-strut reinforcement fabricated by laser powder bed fusion
Source abstract
Abstract
This study investigates the compressive deformation behavior and mechanical performance of Inconel 718 lattice structures fabricated by laser powder bed fusion (LPBF). Four unit-cell topologies—BCC, FCC, BCCZ, and FCCZ—were designed with a unit-cell size of 3 mm and fabricated under identical process conditions to isolate the effect of topology. Measured relative densities ranged from 14.65% to 17.72%. Compressive testing showed that Z-strut-reinforced topologies (BCCZ: 54.6 MPa; FCCZ: 80.2 MPa) exhibited higher strength than their unreinforced counterparts, which may be associated with mixed-mode deformation behavior enabled by the vertically aligned Z-struts. Finite element simulations and Digital Image Correlation (DIC) analysis support the observation of a transition from node-dominated deformation in BCC/FCC to mixed-mode deformation in BCCZ/FCCZ. These findings suggest that unit-cell topology is a key design variable for tailoring deformation mechanisms in LPBF lattice structures.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Cellular and Composite Structures · Additive Manufacturing Materials and Processes · Topology Optimization in Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. The topological design of multifunctional cellular metals10.1016/S0079-6425(00)00016-5 ↗
2. Precipitation-induced transition in the mechanical behavior of 3D printed Inconel 718 bcc lattices10.1016/j.scriptamat.2021.114075 ↗
3. Fabrication, properties and application of porous metals with directional pores10.1016/j.pmatsci.2006.09.001 ↗
4. Review on lattice structures for energy absorption properties10.1016/j.compstruct.2022.116397 ↗
5. LPBF lattice structures: properties, performance, applications and challenges10.1016/j.matdes.2019.108137 ↗
6. On the current research progress of metallic materials fabricated by laser powder bed fusion process: a review10.1016/j.jmrt.2022.07.085 ↗
7. Review on corrosion performance of laser powder-bed fusion printed 316L stainless steel: effect of processing parameters, manufacturing defects, post-processing, feedstock, and microstructure10.1016/j.matdes.2022.110874 ↗
8. Additively-manufactured functionally graded Ti-6Al-4V lattice structures with high strength under static and dynamic loading: experiments10.1016/j.ijimpeng.2017.09.018 ↗
9. Sheet and network based functionally graded lattice structures manufactured by selective laser melting: design, mechanical properties, and simulation10.1016/j.ijmecsci.2020.105480 ↗
10. Fatigue behaviour of NiTi shape memory alloy scaffolds produced by LPBF, a unit cell design comparison10.1016/j.jmbbm.2017.01.016 ↗
11. Structure–property relationship in high strength and lightweight AlSi10Mg microlattices fabricated by selective laser melting10.1016/j.matdes.2019.108062 ↗
12. Constitutive and failure behaviour in selective laser melted stainless steel for microlattice structures10.1016/j.msea.2014.11.028 ↗
13. Influence of LPBF parameters on the compressive behaviour of lattice structures in 17-4PH stainless steel10.1088/1757-899X/1038/1/012035 ↗
14. A review of developments towards dry and high speed machining of Inconel 718 alloy10.1016/S0890-6955(03)00159-7 ↗
15. Nickel based superalloy welding practices for industrial gas turbine applications10.1179/136217104225017099 ↗
16. The machinability of Inconel 71810.1016/S0924-0136(96)02624-6 ↗
17. Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured Inconel 718 superalloy10.1016/j.msea.2015.06.021 ↗
18. The microstructure and mechanical properties of deposited-IN718 by selective laser melting10.1016/j.jallcom.2011.10.107 ↗
19. Selective laser melting additive manufacturing of Inconel 718 superalloy parts: densification, microstructure and properties10.1016/j.jallcom.2013.09.171 ↗
20. Inconel 625 lattice structures manufactured by selective laser melting (SLM): mechanical properties, deformation and failure modes
21. Mechanical and microstructural investigation of nickel-based superalloy IN718 manufactured by selective laser melting (SLM)10.1002/adem.201500158 ↗
22. Design and optimization of lattice structures: a review10.3390/app10186374 ↗
23. Mechanical performance of additively manufactured meta-biomaterials10.1016/j.actbio.2018.12.038 ↗
24. Isotropic Ti–6Al–4V lattice via topology optimization and electron-beam melting
25. Influence of unit cell pose on the mechanical properties of Ti6Al4V lattice structures manufactured by selective laser melting
26. Topology-optimized lattice structures with simultaneously high stiffness and light weight fabricated by selective laser melting: design, manufacturing and characterization10.1016/j.jmapro.2020.06.005 ↗
27. Optimal and continuous multilattice embedding10.1126/sciadv.abf4838 ↗
28. Damage-tolerant architected materials inspired by crystal microstructure10.1038/s41586-018-0850-3 ↗
29. Effects of build orientation and heat treatment on the microstructure and mechanical properties of selective laser melted Ti6Al4V lattice structures
30. Microstructure-topology relationship effects on the quasi-static and dynamic behavior of additively manufactured lattice structures10.1016/j.matdes.2019.107826 ↗
31. Densification behavior, microstructure evolution, and wear performance of selective laser melting processed commercially pure titanium10.1016/j.actamat.2012.04.006 ↗
32. Role of recoil pressure, multiple reflections, and free surface evolution during laser keyhole welding
33. Melt characteristics and solidification growth direction with respect to gravity affecting the interfacial heat transfer coefficient of chill castings10.1016/j.matdes.2009.02.025 ↗
34. Mechanical properties of cellular solids10.1007/BF02645546 ↗