Surface polishing and modification of Ti-6Al-4V alloy by shear thickening polishing

Jiahuan Wang, Yu Zhou, Zhen Qiao, Saurav Goel, Jinhu Wang, Xu Wang, Hongyu Chen, Julong Yuan, Binghai Lyu

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)

Abstract

In this study, a comparison of three newly developed polishing techniques namely, shear thickening polishing (STP), Chemistry enhanced STP (C-STP) and Electrolysis enhanced STP (E-STP) was made to investigate their suitability to Ti-6Al-4V biomaterials polishing and modification, which can produce Beilby layer after polishing and enhance mechanical and biological performance. The surface roughness Sa after STP was about 13.8 nm with a material removal rate of 54.3 nm/min. The C-STP showed the lowest surface roughness of 7.2 nm which was almost half that of STP and the MRR during C-STP was almost 2.1 times that of the conventional STP. The STP did not lead to any change of the surface composition, whereas a 136 nm thick Beilby layer was observed to form during the C-STP which revealed a lower friction coefficient of 0.04 as well as improved osteoblast cell activity. The E-STP showed an intermittent improvement as it provided a surface roughness of 10.2 nm and 1.6 times MRR than that obtained from conventional STP. Due to the dense oxide film of about 60 nm, the E-STP processed surface showed the best wettability and corrosion resistance. Overall, we reveal an important pathway for achieving scalable finishing on Ti-6Al-4V with desirable surface characteristics.

Original languageEnglish
Article number129771
JournalSurface and Coatings Technology
Volume468
DOIs
Publication statusPublished - 15 Sept 2023
Externally publishedYes

Keywords

  • Biomaterials
  • Shear thickening polishing
  • Surface characteristics
  • Surface modification
  • Ti-6Al-4V alloy

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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