TY - JOUR
T1 - Experimental and finite element simulation studies of the bio-tribological behavior of L-PBF Ti-6Al-4V alloys with various surface roughness
AU - Yu, Huipeng
AU - Ju, Jiang
AU - Yang, Tao
AU - Wang, Chenchen
AU - Zhang, Tianlong
AU - Peng, Peng
AU - Feng, Ting
AU - Ding, Chenyang
AU - Kang, Maodong
AU - Wang, Jun
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/6
Y1 - 2024/6
N2 - Recently, 3D-printed Ti-6Al-4 V alloys have been gradually used for medical implants, where surface quality plays a crucial role in bio-tribological resistance. In this study, we designed three Ti-6Al-4 V samples through mechanical grinding, polishing, and sandblasting to explore the effect of surface roughness on the bio-tribological behavior against the Si3N4 counter-ball in a simulated body fluid (SBF) solution. Results indicate an increasing trend in the bio-tribological properties with decreasing surface roughness, with the polished sample exhibiting the lowest wear rate (2.73 × 10−3 mm3/N·m) and superior bio-tribological resistance. Finite element simulation reveals that asperities on the rougher surface sample lead to stress concentration, forming larger asperity fragments, enhancing mechanical interlocking and thus intensifying wear. Additionally, with increasing surface roughness, the wear mechanism of the as-printed Ti-6Al-4 V alloy shifts from abrasive and adhesive wear to a combination of abrasive, adhesive, and oxidative wear. This study provides valuable insights into the effect of surface roughness on the bio-tribological properties of as-printed Ti-6Al-4 V alloys, offering guidance for regulating surface quality in biomedical implants.
AB - Recently, 3D-printed Ti-6Al-4 V alloys have been gradually used for medical implants, where surface quality plays a crucial role in bio-tribological resistance. In this study, we designed three Ti-6Al-4 V samples through mechanical grinding, polishing, and sandblasting to explore the effect of surface roughness on the bio-tribological behavior against the Si3N4 counter-ball in a simulated body fluid (SBF) solution. Results indicate an increasing trend in the bio-tribological properties with decreasing surface roughness, with the polished sample exhibiting the lowest wear rate (2.73 × 10−3 mm3/N·m) and superior bio-tribological resistance. Finite element simulation reveals that asperities on the rougher surface sample lead to stress concentration, forming larger asperity fragments, enhancing mechanical interlocking and thus intensifying wear. Additionally, with increasing surface roughness, the wear mechanism of the as-printed Ti-6Al-4 V alloy shifts from abrasive and adhesive wear to a combination of abrasive, adhesive, and oxidative wear. This study provides valuable insights into the effect of surface roughness on the bio-tribological properties of as-printed Ti-6Al-4 V alloys, offering guidance for regulating surface quality in biomedical implants.
KW - Bio-tribological behavior
KW - Finite element method
KW - Selected laser melting
KW - Surface roughness
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85187208804&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2024.109514
DO - 10.1016/j.triboint.2024.109514
M3 - 文章
AN - SCOPUS:85187208804
SN - 0301-679X
VL - 194
JO - Tribology International
JF - Tribology International
M1 - 109514
ER -