Characterization of the influence of laser cut surfaces on the fatigue behavior of Ti-6Al-4V-ELI

提交的项目的总体目标是对激光切割过程对Ti-6Al-4V-ELI合金疲劳行为的影响进行全面的实验分析，Ti-6Al-4V-ELI合金是一种用于医疗应用的标准合金，特别是医疗植入物。激光切割是一种成熟的制造工艺，用于实现许多复杂的几何形状的植入物结构。使用激光切割作为首选加工技术的主要挑战之一是热影响区和表面质量（毛刺和表面浮雕）对植入物疲劳行为的影响。为了确定激光切割表面的主要失效相关影响，将对经过和没有经过后续表面处理（桶形精加工和机械抛光）的样品进行疲劳处理，并进行广泛的断口学和金相分析。将结果与纯钛和-钛合金的结果进行比较，将阐明缺口灵敏度对钛合金在激光切割表面条件下疲劳行为的影响。

The overall goal of the project submitted is a comprehensive experimental analysis of the influence of a laser cutting process on the fatigue behavior of the alloy Ti-6Al-4V-ELI which is a standard alloy used in medical applications, in particular medical implants. Laser cutting is a well-established manufacturing process applied for realizing the many complex geometries nowadays typical for implant structures. One of the major challenges of using laser cutting as the preferred process technology is the influence of the heat-affected zone and the surface quality (burr and surface relief) on the fatigue behavior of implants. In order to identify the major failure relevant effects of the laser cutting surface, samples with and without subsequent surface finish (barrel finishing and mechanical polishing) will be fatigued accompanied by extensive fractographic and metallographic analyses. A comparison of the findings with results for pure titanium and a -Titanium alloy shall clarify the effect of notch sensitivity on the fatigue behavior of Titanium alloys with laser cut surface conditions.