Understanding the Machinability of Titanium Alloy Components From a Range of Processing Routes to Inform Tooling Solutions for Next Generation Closed

Ti-6Al-4V是航空航天工业的主力钛合金，也用于生物医学和高价值应用，其中耐腐蚀性，生物相容性，疲劳性能和高强度重量比非常重要。然而，合金的可加工性在很大程度上取决于加工路线和发展的显微组织。通常，无论加工路线如何，相同的刀具插入材料往往用于Ti-6Al-4V组件。但随着越来越多的新兴添加剂和烧结路线上线，有必要了解上游加工与下游加工响应之间的关系，以便为不同的加工路线量身定制工具解决方案。该项目的目的是了解一系列不同的Ti-6Al-4V加工路线对可加工性和刀具磨损的影响。Ti-6Al-4V样品将采用传统的锻造路线和新兴的路线，如激光粉末床熔合，线材增材制造和固态粉末路线，如场辅助烧结技术和热等静压。此外，由于从航空航天到其他行业（如汽车和海上）的钛合金可持续闭环回收的转变，对废料基原料的需求也有所增加。您将研究不同上游液态和固态加工路线对刀具刀具磨损寿命和涂层行为产生的潜在地下微观结构（和纹理）的影响。这项研究的结果将确定一系列闭环加工和回收路线的最佳工具解决方案。您可以获得材料并接受加工设备培训，使您能够在山特维克可乐满英国研发中心生产全系列Ti-6Al-4V样品，用于后续的加工研究。您将使用谢菲尔德和曼彻斯特的一系列表征设施，包括最先进的显微镜和表面分析技术。您还将与英国和瑞典山特维克可乐满的研究人员一起对刀具刀片和基材进行专业分析。该项目还将纳入热力学建模和基本编码，以帮助理解工具/Ti6Al-4V相互作用的机理。

Ti-6Al-4V is the workhorse titanium alloy for the aerospace industry and is also used in biomedical and high value applications where corrosion resistance, biocompatibility, fatigue performance and high strength to weight ratio are important. However, the machinability of the alloy is largely driven by the processing route and microstructure developed. Conventionally, the same tool insert material tends to be used for Ti-6Al-4V components, regardless of processing route. But with more emerging additive and sintering routes coming online, there is a need to understand the relationship between upstream processing on downstream machining response - in order to tailor tooling solutions for different processing routes. The aim of this project is to understand the effect of a range of different processing routes for Ti-6Al-4V on the machinability and tool wear. Ti-6Al-4V samples will be produced from both conventional forgings routes and emerging routes such as laser powder bed fusion, wire additive manufacturing and solid-state powder routes, such as field-assisted sintering technology and hot isostatic pressing. In addition, there is a need for scrap based feedstocks due to a move to sustainable closed-loop recycling of titanium alloys from aerospace into other sectors, such as automotive and offshore. You will study the effects of the underlying subsurface microstructure (and texture) generated by the varied upstream liquid and solid-state processing routes on the tool insert wear life and coating behaviour. The outputs of this research will determine optimum tooling solutions for a range of closed-loop processing and recycling routes. You have access to materials and be trained in processing equipment to enable you to produce a whole range of Ti-6Al-4V samples for subsequent machining studies at Sandvik Coromant's R&D facility in the UK. You will use a host of characterisation facilities in Sheffield and Manchester including state-of-the-art microscopes and surface profiling techniques. You will also spend time with researchers in Sandvik Coromant, UK and Sweden and carry out specialised analysis on the tool inserts and substrate material. The project will also incorporate thermodynamic modelling and basic coding to help with the mechanistic understanding of the tool/Ti6Al-4V interaction.