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

激光切割表面对 Ti-6Al-4V-ELI 疲劳行为影响的表征

• 批准号: 402380578
• 负责人: Professorin Dr.-Ing. Martina Zimmermann
• 金额: --
• 依托单位: Institut für Werkstoffwissenschaft
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/402380578?language=en
• 关键词: Characterization; influence; laser; cut; surfaces

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.

提交项目的总体目标是对激光切割工艺对Ti-6Al-4V-ELI合金疲劳行为的影响进行综合实验分析，该合金是医疗应用中使用的标准合金，特别是医疗植入物。激光切割是一种成熟的制造工艺，用于实现当今植入物结构的许多典型复杂几何形状。使用激光切割作为首选工艺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，将对具有和不具有后续表面精加工（滚筒精加工和机械抛光）的样品进行疲劳试验，并进行广泛的断口和金相分析。将结果与纯钛和钛合金的结果进行比较，应阐明缺口敏感性对激光切割表面条件下钛合金疲劳行为的影响。

项目成果

Fatigue Behavior of Non-Optimized Laser-Cut Medical Grade Ti-6Al-4V-ELI Sheets and the Effects of Mechanical Post-Processing

• DOI: 10.3390/met9080843
• 发表时间: 2019-07
• 期刊: Metals
• 影响因子: 2.9
• 作者: A. Reck;A. Zeuner;M. Zimmermann