Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/107384
Title: | Superelastic NiTi functional components by high-precision laser powder bed fusion process : the critical roles of energy density and minimal feature size | Authors: | Qu, S Wang, L Ding, J Fu, J Gao, S Ma, Q Liu, H Fu, M Lu, Y Song, X |
Issue Date: | Jul-2023 | Source: | Micromachines, July 2023, v. 14, no. 7, 1436 | Abstract: | Additive manufacturing (AM) was recently developed for building intricate devices in many fields. Especially for laser powder bed fusion (LPBF), its high-precision manufacturing capability and adjustable process parameters are involved in tailoring the performance of functional components. NiTi is well-known as smart material utilized widely in biomedical fields thanks to its unique superelastic and shape-memory performance. However, the properties of NiTi are extremely sensitive to material microstructure, which is mainly determined by process parameters in LPBF. In this work, we choose a unique NiTi intricate component: a robotic cannula tip, in which material superelasticity is a crucial requirement as the optimal object. First, the process window was confirmed by printing thin walls and bulk structures. Then, for optimizing parameters precisely, a Gyroid-type sheet triply periodic minimal-surface (G-TPMS) structure was proposed as the standard test sample. Finally, we verified that when the wall thickness of the G-TPMS structure is smaller than 130 μm, the optimal energy density changes from 167 J/m3 to 140 J/m3 owing to the lower cooling rate of thinner walls. To sum up, this work puts forward a novel process optimization methodology and provides the processing guidelines for intricate NiTi components by LPBF. | Keywords: | 3D printing Energy density Laser powder bed fusion Mechanical testing NiTi alloy Robotic cannula TPMS lattice |
Publisher: | MDPI AG | Journal: | Micromachines | EISSN: | 2072-666X | DOI: | 10.3390/mi14071436 | Rights: | Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The following publication Qu S, Wang L, Ding J, Fu J, Gao S, Ma Q, Liu H, Fu M, Lu Y, Song X. Superelastic NiTi Functional Components by High-Precision Laser Powder Bed Fusion Process: The Critical Roles of Energy Density and Minimal Feature Size. Micromachines. 2023; 14(7):1436 is availblae at https://doi.org/10.3390/mi14071436. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
micromachines-14-01436.pdf | 4.84 MB | Adobe PDF | View/Open |
Page views
9
Citations as of Jun 30, 2024
Downloads
4
Citations as of Jun 30, 2024
SCOPUSTM
Citations
2
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
2
Citations as of Jun 27, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.