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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Process-Induced Anisotropy and Synovial Environment on Wear of EBM Built Ti6Al4V Joint Implants
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Influence of Process-Induced Anisotropy and Synovial Environment on Wear of EBM Built Ti6Al4V Joint Implants

机译：过程诱导的各向异性和滑膜环境对ebm磨损的影响Ti6Al4V关节植入物的影响

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摘要

Additive manufacturing (AM) technology is identified as an ideal solution to overcome challenges in design and manufacturing of complex components. However, the layered fashion of AM process result in directionally solidified microstructures on the system. The anisotropic surface texture will affect wear and corrosion resistance. The current study investigates tribological responses of AM-made Ti6Al4V for joint implant applications during the combined effect from synovial lubrication and process-induced surface structure on surface fatigue damage response. Electron beam melting was used to produce Ti6Al4V specimens and mechanical characterizations were performed using nanoindentation and micro bending tests to determine their mechanical properties. A series of pin-on-disk wear tests were performed to quantify sliding contact fatigue damage in three simulated synovial fluids with variable concentrations of bovine serum albumin and hyaluronic acid in the PBS solution. Physical properties of simulated synovial fluids were measured using a nanoindenter-based technique and correlated to fatigue wear response. The lower wear rate is found in greater protein concentrations. The results presented AM build direction significantly affects sliding fatigue wear resistance on TI6Al4V surface in all synovial environments.
机译：添加剂制造（AM）技术被确定为克服复杂组分的设计和制造挑战的理想解决方案。然而，AM处理的分层方式导致系统上的定向固化微结构。各向异性表面纹理将影响磨损和耐腐蚀性。目前的研究调查了在从滑膜润滑和过程诱导的表面结构对表面疲劳损伤反应的综合效应过程中进行了AM制作Ti6Al4V的摩擦学反应。电子束熔化用于产生Ti6Al4V样品，使用纳米凸缘和微弯曲试验进行机械表征，以确定其机械性能。进行一系列销芯片磨损试验，以在PBS溶液中具有可变浓度的牛血清白蛋白和透明质酸的三种模拟滑膜液中的滑动接触疲劳损伤。使用纳米茚基的技术测量模拟滑膜流体的物理性质，并与疲劳磨损反应相关。在更大的蛋白质浓度下发现较低的磨损率。呈现AM构建方向的结果显着影响所有滑膜环境中Ti6Al4V表面的滑动疲劳耐磨性。

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