Tribological performances of molded micro-cratered surface of superelasticity TiNi alloy

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:Tribological performances of molded micro-cratered surface of superelasticity TiNi alloy
• Journal:Rare metal materials and engineering
• Summary:The surface texturing produces excellent surface properties such as the anti-friction, wear resistance, the surface hydrophilic/lipophilic and hydrophobic/oleophobic performances instead of changing the substrate material. Micro-crater texture of TiNi alloy surface can reduce the fluid drag, and its hump texture can improve the growth of creature tissue on the surface. The micro-crater texture of TiNi alloy was voluminously indented by a mold. Results showed that the geometrical parameters of texture modified the tribological properties. When the circumferential pitch and radial spacing of texture increasing, the coefficient of friction and wear rate of TiNi alloy revealed a decrease at the start, and then increase after a minimum point. Gradually increasing the ratio of depth to diameter, the coefficient of friction and wear rate of TiNi alloy increased initially and then tend to decrease. When sliding speed increased, coefficient of friction of TiNi alloy decreased firstly, and then increases following the trend of Stribeck curve. Selected texture parameters such as micro-crater depth to diameter ratio of 0.06, the radial distance of 1.5 mm, circumferential pitch of 15° perform best tribological properties of coefficient of friction of 0.098 and wear rate of 0.87 × 10-5 mm3/(N • m). It is concluded that the texture with appropriate parameters and shapes can reduce the coefficient of friction and wear because of micro-hydrodynamic lubrication and capture of wear debris from micro-crater texture.
• Co-author:Dong Guangneng et al
• Volume:40(8)(2011)
• Page Number:1334-1338
• Translation or Not:No
• Date of Publication:2011-06-14