Fundamental analyses regarding the influence of aluminum content in titanium alloys on the electric discharge machinability and the resulting component functionality

关于钛合金中铝含量对放电加工性和所得部件功能影响的基础分析

基本信息

批准号：
326341551
负责人：
Professor Dr.-Ing. Fritz Klocke
金额：
--
依托单位：
Werkzeugmaschinenlabor - WZL
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/326341551?language=en
关键词：
Fundamental analyses regarding influence aluminum

项目摘要

Titanium alloys inherit great potential when it comes to increasing efficiency in turbo machinery components due to their great specific strengths and temperature resistances. The trend in material developments in this field focuses on the highly alloyed intermetallic gamma titanium aluminides. Thus, the machining of components out of titanium alloys with the help of conventional processes is getting increasingly challenging. Nevertheless electric discharge machining (EDM) is independent from the materials mechanical properties, so EDM processes represent an important alternative for the machining of these hard-to-machine titanium alloys. Specific geometric elements on turbomachinery components are already nowadays manufactured by EDM processes by default, e.g. seal slots and cooling holes on turbine blades or inner contours of diffusors and blade geometries on blisks in the field of prototype construction.For the near future it can be assumed that the demand for EDM processes will grow on, but this needs the process to become more efficient and the possibility for a deterministic process configuration. The state of the art shows that there is not enough knowledge about titanium alloys up to this day to realize this deterministic configuration. Furthermore it has not been clarified which specifications in low alloyed titanium like Ti-6Al-4V are responsible for the fact, that the Sinking EDM process - unlike the machining of other materials, especially the highly alloyed titanium aluminides - need an inversed electric polarity. The exact break point as a function of alloying contends is not known.This proposal addresses the fundamental research on the influence of different phase fractions and distributions (micro structure) of the main alloying elements titanium and aluminum on the process performance during Sinking-EDM. This will finally generate a model based process and material understanding that will allow the deterministic Sinking EDM process configuration for titanium and titanium alloys. On top of that, the third and fourth research year shall address research on component functionality aspects in relation to the EDM process by static and dynamic bending tests. This will allow end users to design their manufacturing process based on resulting component functionality aspects.

钛合金在提高涡轮机械组件的效率上，由于其特异性强度和温度抗性，其巨大的潜力。该领域的材料发展趋势集中在高度合金的金属间伽马钛铝铝化材料上。因此，在常规过程的帮助下，钛合金的组件加工变得越来越具有挑战性。尽管如此，电排放加工（EDM）与材料机械性能无关，因此EDM工艺代表了这些难以机械钛合金的加工的重要替代方法。如今，默认情况下，EDM过程已经制造了涡轮机械组件上的特定几何元素，例如涡轮叶片上的密封插槽和冷却孔或扩散器的内部轮廓和原型构造领域闪烁的叶片几何形状。对于不久的将来，可以假定对EDM过程的需求将继续增长，但是这需要变得更有效，并且可能会变得更有效，并且有可能进行确定性的过程配置。艺术的状态表明，直到今天，关于钛合金还没有足够的知识来实现这种确定性配置。此外，尚未澄清诸如TI -6AL -4V（TI -6AL -4V）中的低合金钛中的规格是因为下沉的EDM工艺 - 与其他材料的加工，尤其是高度合金的铝制铝制 - 需要反向电极性。确切的断裂点是合金竞争的函数。该提案介绍了主要合金元素钛和铝对下沉过程中过程性能的不同相位分数和分布（微结构）的影响的基础研究。这最终将产生基于模型的过程和物质理解，这将允许确定性的下沉EDM工艺配置针对钛和钛合金。最重要的是，第三和第四研究年应通过静态和动态弯曲测试来解决与EDM过程有关的组件功能方面的研究。这将使最终用户能够根据所得的组件功能方面设计其制造过程。