Compressive Mechanics and Hyperelasticity of Ni-Ti Lattice Structures Fabricated by Selective Laser Melting

Cong Zhang; Jiulu Jin; Meng He; Lei Yang

doi:10.3390/cryst12030408

journal article Open Access Mar 17, 2022

Compressive Mechanics and Hyperelasticity of Ni-Ti Lattice Structures Fabricated by Selective Laser Melting

Cong Zhang

Jiulu Jin Meng He

Lei Yang

Crystals Vol. 12 No. 3 pp. 408 · MDPI AG

View at Publisher Save 10.3390/cryst12030408

Abstract

Additively manufactured Ni-Ti lattice structures have controllable bio/mechanical properties, as well as excellent large deformation and damping properties similar to those of natural bone. They have broad application prospects in the field of bone implantation. Triply Periodic Minimal Surface (TPMS) structures are believed to be the most potential and ideal bionic bone structures. In this work, Ni-Ti Gyroid-type TPMS lattice structures were fabricated by selective laser melting (SLM) and their manufacturing fidelity and compression properties were evaluated. By changing the maximum strain value, the hyperelastic recovery performance under cyclic stress was investigated. The results showed that the Ni-Ti Gyroid lattice structures fabricated by SLM had excellent manufacturability (relative density can reach 98.93%) and mechanical properties (elastic modulus is about 130.8 MPa, ultimate strength is about 2.7 MPa). The hyperelastic cycle testing showed that the elastic modulus, yield strength and ultimate strength of the lattice structures tended to stablilize gradually with increasing numbers of cycles. The residual strain increased with the number of cycles, and as the maximum strain increased from 4% to 8%, the residual strain also increased from 1% to 4%.

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Details

Published: Mar 17, 2022
Vol/Issue: 12(3)
Pages: 408
License: View

Authors

C

Cong Zhang

School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China; Hubei Longzhong Laboratory, Xiangyang 441136, China

J

Jiulu Jin

School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China; Hubei Longzhong Laboratory, Xiangyang 441136, China

M

Meng He

Gemmological Institute, China University of Geosciences, Wuhan 430074, China; School of Civil Environmental Engineering & Architecture, Hubei University of Technology, Wuhan 430068, China

L

Lei Yang

School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China; Hubei Longzhong Laboratory, Xiangyang 441136, China

Cite This Article

Cong Zhang, Jiulu Jin, Meng He, et al. (2022). Compressive Mechanics and Hyperelasticity of Ni-Ti Lattice Structures Fabricated by Selective Laser Melting. Crystals, 12(3), 408. https://doi.org/10.3390/cryst12030408

Compressive Mechanics and Hyperelasticity of Ni-Ti Lattice Structures Fabricated by Selective Laser Melting

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