Feasibility study on ultraprecision micro-milling of the additively manufactured NiTi alloy for generating microstructure arrays

Hanheng Du; Chenliang Wu; Denghui Li; Wai Sze Yip; Zuankai Wang; Suet To

doi:10.1016/j.jmrt.2023.05.214

Feasibility study on ultraprecision micro-milling of the additively manufactured NiTi alloy for generating microstructure arrays

Hanheng Du
, Chenliang Wu
, Denghui Li
, Wai Sze Yip
, Zuankai Wang
, Suet To^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

16 Citations (Scopus)

52 Downloads (CityUHK Scholars)

Abstract

Nickel-titanium (NiTi) alloy has unique functional properties in medical and microelectronics products. Recently, additive manufacturing has become an attractive way of fabricating NiTi alloy. However, the study of generating microstructure arrays on additively manufactured (AMed) NiTi alloy surfaces remains unclear. Motivated by this, this study proposes the ultraprecision micro-milling (UMM) process to generate microstructure arrays and perform a systematic investigation. First, selective laser melting, as a popular additive manufacturing way, was utilized to fabricate the AMed NiTi alloy. Then, the UMM process was carried out to machine these samples. After the machining experiments, a mirror surface with a surface roughness of 0.014 μm can be acquired, which demonstrates the good machinability of the AMed NiTi alloy. Moreover, the micro-groove array and micro-pillar array with low machining errors were machined on the AMed NiTi alloy surfaces, which verifies the effectiveness of the proposed machining process. The corresponding cutting forces, tool conditions, and chip morphologies were studied to fully understand the machining mechanism of the AMed NiTi alloy. Besides, the surface wettability of microstructure arrays was also quantitatively analyzed. Therefore, this study provides a facile and effective machining process for generating microstructure arrays on the AMed NiTi alloy surfaces. © 2023 The Author(s).

Original language	English
Pages (from-to)	55-67
Journal	Journal of Materials Research and Technology
Volume	25
Online published	26 May 2023
DOIs	https://doi.org/10.1016/j.jmrt.2023.05.214
Publication status	Published - Jul 2023
Externally published	Yes

Funding

This work was funded by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No.: PolyU 15221322), the National Natural Science Foundation of China (Project No.: U19A20104), the Shenzhen Science and Technology Program (Project No.: JCYJ20210324131214039), and State Key Laboratory of Ultra-precision Machining Technology.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Additive manufacturing
Microstructure array
NiTi alloy
Surface wettability
Ultraprecision micro-milling

Publisher's Copyright Statement

This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

RGC Funding Information

RGC-funded

Access Output

10.1016/j.jmrt.2023.05.214

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title = "Feasibility study on ultraprecision micro-milling of the additively manufactured NiTi alloy for generating microstructure arrays",

abstract = "Nickel-titanium (NiTi) alloy has unique functional properties in medical and microelectronics products. Recently, additive manufacturing has become an attractive way of fabricating NiTi alloy. However, the study of generating microstructure arrays on additively manufactured (AMed) NiTi alloy surfaces remains unclear. Motivated by this, this study proposes the ultraprecision micro-milling (UMM) process to generate microstructure arrays and perform a systematic investigation. First, selective laser melting, as a popular additive manufacturing way, was utilized to fabricate the AMed NiTi alloy. Then, the UMM process was carried out to machine these samples. After the machining experiments, a mirror surface with a surface roughness of 0.014 μm can be acquired, which demonstrates the good machinability of the AMed NiTi alloy. Moreover, the micro-groove array and micro-pillar array with low machining errors were machined on the AMed NiTi alloy surfaces, which verifies the effectiveness of the proposed machining process. The corresponding cutting forces, tool conditions, and chip morphologies were studied to fully understand the machining mechanism of the AMed NiTi alloy. Besides, the surface wettability of microstructure arrays was also quantitatively analyzed. Therefore, this study provides a facile and effective machining process for generating microstructure arrays on the AMed NiTi alloy surfaces. {\textcopyright} 2023 The Author(s).",

keywords = "Additive manufacturing, Microstructure array, NiTi alloy, Surface wettability, Ultraprecision micro-milling",

author = "Hanheng Du and Chenliang Wu and Denghui Li and Yip, \{Wai Sze\} and Zuankai Wang and Suet To",

year = "2023",

month = jul,

doi = "10.1016/j.jmrt.2023.05.214",

language = "English",

volume = "25",

pages = "55--67",

journal = "Journal of Materials Research and Technology",

issn = "2238-7854",

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TY - JOUR

T1 - Feasibility study on ultraprecision micro-milling of the additively manufactured NiTi alloy for generating microstructure arrays

AU - Du, Hanheng

AU - Wu, Chenliang

AU - Li, Denghui

AU - Yip, Wai Sze

AU - Wang, Zuankai

AU - To, Suet

PY - 2023/7

Y1 - 2023/7

N2 - Nickel-titanium (NiTi) alloy has unique functional properties in medical and microelectronics products. Recently, additive manufacturing has become an attractive way of fabricating NiTi alloy. However, the study of generating microstructure arrays on additively manufactured (AMed) NiTi alloy surfaces remains unclear. Motivated by this, this study proposes the ultraprecision micro-milling (UMM) process to generate microstructure arrays and perform a systematic investigation. First, selective laser melting, as a popular additive manufacturing way, was utilized to fabricate the AMed NiTi alloy. Then, the UMM process was carried out to machine these samples. After the machining experiments, a mirror surface with a surface roughness of 0.014 μm can be acquired, which demonstrates the good machinability of the AMed NiTi alloy. Moreover, the micro-groove array and micro-pillar array with low machining errors were machined on the AMed NiTi alloy surfaces, which verifies the effectiveness of the proposed machining process. The corresponding cutting forces, tool conditions, and chip morphologies were studied to fully understand the machining mechanism of the AMed NiTi alloy. Besides, the surface wettability of microstructure arrays was also quantitatively analyzed. Therefore, this study provides a facile and effective machining process for generating microstructure arrays on the AMed NiTi alloy surfaces. © 2023 The Author(s).

AB - Nickel-titanium (NiTi) alloy has unique functional properties in medical and microelectronics products. Recently, additive manufacturing has become an attractive way of fabricating NiTi alloy. However, the study of generating microstructure arrays on additively manufactured (AMed) NiTi alloy surfaces remains unclear. Motivated by this, this study proposes the ultraprecision micro-milling (UMM) process to generate microstructure arrays and perform a systematic investigation. First, selective laser melting, as a popular additive manufacturing way, was utilized to fabricate the AMed NiTi alloy. Then, the UMM process was carried out to machine these samples. After the machining experiments, a mirror surface with a surface roughness of 0.014 μm can be acquired, which demonstrates the good machinability of the AMed NiTi alloy. Moreover, the micro-groove array and micro-pillar array with low machining errors were machined on the AMed NiTi alloy surfaces, which verifies the effectiveness of the proposed machining process. The corresponding cutting forces, tool conditions, and chip morphologies were studied to fully understand the machining mechanism of the AMed NiTi alloy. Besides, the surface wettability of microstructure arrays was also quantitatively analyzed. Therefore, this study provides a facile and effective machining process for generating microstructure arrays on the AMed NiTi alloy surfaces. © 2023 The Author(s).

KW - Additive manufacturing

KW - Microstructure array

KW - NiTi alloy

KW - Surface wettability

KW - Ultraprecision micro-milling

UR - https://www.scopus.com/pages/publications/85160832228

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85160832228&origin=recordpage

U2 - 10.1016/j.jmrt.2023.05.214

DO - 10.1016/j.jmrt.2023.05.214

M3 - RGC 21 - Publication in refereed journal

SN - 2238-7854

VL - 25

SP - 55

EP - 67

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

ER -

Feasibility study on ultraprecision micro-milling of the additively manufactured NiTi alloy for generating microstructure arrays

Abstract

Funding

UN SDGs

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

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