Page 98 - MSAM-3-2

Materials Science in

Additive Manufacturing

ORIGINAL RESEARCH ARTICLE
Compressive properties and fatigue

performance of NiTi lattice structures optimized
by TPMS

1
Yunlong Ren , Yang Li , Lei Yang 1,2,3 * , Yun Chen * , Chunze Yan , Bing Liu ,
1,2
4
3
1,2
Xuan Cai , Mingkang Zhang 5 , and Yusheng Shi 3
4
1 Department of Mechanical Design and Manufacturing, School of Transportation and Logistics
Engineering, Wuhan University of Technology, Wuhan, Hubei, China
2 Hubei Longzhong Laboratory, Xiangyang, Hubei, China
3 State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials
Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China
4 Wuhan Second Ship Design and Research Institute, Wuhan, Hubei, China
5 Additive Manufacturing Laboratory and Mechanics Experiment Center, School of Mechanical and
Energy Engineering, Guangdong Ocean University, Yangjiang, Guangdong, China
(This article belongs to the Special Issue: 3D Printing for Structural and Functional Integration)

Abstract

Nickel titanium (NiTi) lattice structures prepared by laser powder bed fusion
(LPBF) have great application potential, due to their unique shape memory effect,
superelasticity, and controlled geometry characteristics. In this study, the NiTi I-graph-
wrapped package (I-WP) and NiTi body-centered cubic (BCC) lattice structure samples
were prepared by the LPBF process. The uniaxial compression properties and cyclic
*Corresponding authors:
Lei Yang compression properties of NiTi lattice structure samples prepared by LPBF process were
(lei.yang@whut.edu.cn) studied. The results showed that the surfaces of NiTi lattice structures were very rough
Yun Chen and adhered with many powder particles. The sample optimization design through the
(chenyunhbwh@whut.edu.cn)
minimal surface could effectively improve the mechanical properties and deformation
Citation: Ren Y, Li Y, Yang L, et al., resistance and change the surface morphology of fracture surfaces in high cycle
2024, Compressive properties and
fatigue performance of NiTi lattice fatigue. The I-WP lattice structure had a higher Young’s modulus and yield strength.
structures optimized by TPMS. The fatigue strength improved from 1.88 MPa (BCC structure lattice) to 2.08 MPa
Mater Sci Add Manuf. (I-WP structure lattice). The simulation was performed to investigate the mechanism
doi: 10.36922/msam.3380
underlying the improvement in fatigue strength, revealing that optimization of surface
Received: 22 May 2024 stress distribution could be the plausible reason. In general, this study provides valuable
Accepted: 01 June 2024 guidance for the preparation and design of NiTi lattice structure by the LPBF process.
Published Online: June 20, 2024
Copyright: © 2024 Author(s). Keywords: Nickel titanium alloy; Additive manufacturing; Triply periodic minimal surface;
This is an Open-Access article Laser powder bed fusion; Lattice structure
distributed under the terms of the
Creative Commons Attribution
License, permitting distribution,
and reproduction in any medium,
provided the original work is
properly cited. 1. Introduction
Publisher’s Note: AccScience Nickel titanium (NiTi) alloys possess distinctive shape memory effect, superelasticity,
Publishing remains neutral with biocompatibility, superior fatigue life , and other characteristics and have outstanding
1
regard to jurisdictional claims in
published maps and institutional performance in shock absorption, justifying their extensive applications in aerospace,
2,3
affiliations. biomedical, automotive, construction engineering, and other fields. In addition, the
Volume 3 Issue 2 (2024) 1 doi: 10.36922/msam.3380