ABSTRACT Surface roughness, microhardness, and wettability are the surface characteristics which significantly influence the implant performance. Laser surface modification with raster scan is a well-known technique for processing the material surfaces. This technique has potential to modify multiple surface characteristics together. However, multiple process parameters are involved and each parameter can affect individual surface characteristics differently. This work focuses on processing multiple surface characteristics (surface roughness, micro-hardness, and wettability) with laser surface modification. Laser surface modification of Ti6Al4V is performed with wide range of process parameters. The laser modified samples are characterized, and surface roughness, microhardness, and wettability are measured. A modified heat input parameter is introduced, which accounts for multiple LSM process parameters. The range of the modified heat input parameter for various implants are identified, by superimposing the modified heat input parameters for experiments against the surface requirements of implants, on the Ashby styled three-dimensional projection plot. Comparable combinations of surface characteristics are achieved from different combinations of the process parameters with similar modified heat input parameters. This study shows that multiple surface characteristics can be processed together to meet implant specific requirements and full potential of the laser surface modification process can be utilized.

中文翻译：

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Ti6Al4V 生物医学植入物多种表面特征的激光加工

摘要 表面粗糙度、显微硬度和润湿性是显着影响种植体性能的表面特征。使用光栅扫描进行激光表面改性是一种众所周知的材料表面处理技术。这种技术有可能一起修改多个表面特征。然而，涉及多个工艺参数，每个参数都会不同地影响单个表面特性。这项工作的重点是通过激光表面改性处理多种表面特征（表面粗糙度、显微硬度和润湿性）。Ti6Al4V 的激光表面改性在广泛的工艺参数下进行。对激光改性样品进行表征，并测量表面粗糙度、显微硬度和润湿性。引入了修改后的热输入参数，它考虑了多个 LSM 工艺参数。通过在 Ashby 风格的 3D 投影图上根据植入物的表面要求叠加用于实验的修正热输入参数，确定各种植入物的修正热输入参数范围。表面特性的可比较组合是通过具有相似修改的热输入参数的工艺参数的不同组合来实现的。该研究表明，可以一起处理多种表面特征以满足植入物的特定要求，并且可以充分利用激光表面改性工艺的潜力。通过在 Ashby 风格的 3D 投影图上叠加修改后的热输入参数，根据植入物的表面要求进行实验。表面特性的可比较组合是通过具有相似修改的热输入参数的工艺参数的不同组合来实现的。该研究表明，可以一起处理多种表面特征以满足植入物的特定要求，并且可以充分利用激光表面改性工艺的潜力。通过在 Ashby 风格的 3D 投影图上叠加修改后的热输入参数，根据植入物的表面要求进行实验。表面特性的可比较组合是通过具有相似修改的热输入参数的工艺参数的不同组合来实现的。该研究表明，可以一起处理多种表面特征以满足植入物的特定要求，并且可以充分利用激光表面改性工艺的潜力。