STTR Phase I: Forming of Cast Titanium Structures by Transformation Superplasticity

STTR 第一阶段：通过相变超塑性形成铸造钛结构

• 批准号: 0420083
• 负责人: Edward Chen
• 金额: $ 10万
• 依托单位: TiTech International, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0420083&HistoricalAwards=false
• 关键词: STTR; Phase; Forming; Cast; Titanium

This Small Business Technology Transfer (STTR) Phase I project examines the feasibility of using a casting transformation superplastic forming (TSP) hybrid process to produce affordable, high quality titanium parts, primarily for the aerospace industry. The project is aimed at preserving the advantages and reducing the cost and processing time, by exploring the attributes of investment casting and TSP. TSP is slow relative to conventional SPF, but investment casting can provide near net shape, greatly reducing the time required for TSP to achieve a final desired shape. Conversely, cast titanium microstructures are only amenable to superplastic forming by TSP. In this project, blanks will be cast and undergo TSP to selected final forms. Specimens will be inspected/tested for dimensional control, pre- and post-TSP microstructural characterization, and mechanical properties. The ability to produce complex titanium components by this approach could offer a significant cost savings allowing for even more widespread use of titanium.The broader impacts from this technology would be a new casting process. If successful, this technology could be used immediately to replace more expensive SPF for forged/machined structures, as well as allowing for more sophisticated and complex shapes. There would be a pay-off through weight reduction (thinner walls) as well as a reduction in bulk and weight for related support structures, increasing the thrust-to-weight ratio and overall fuel efficiency of aerospace systems.

这个小型企业技术转移（STTR）I阶段项目研究了使用铸造转换型超塑性形成（TSP）混合过程的可行性，主要用于航空航天行业，这是生产负担得起的高质量钛零件。 该项目旨在通过探索投资铸造和TSP的属性来维护优势并减少成本和处理时间。 相对于传统的SPF，TSP的速度较慢，但​​是投资铸造可以提供接近净形状，从而大大减少了TSP实现最终所需形状所需的时间。 相反，铸造钛微结构仅适合通过TSP形成的超塑料。 在此项目中，将仓库铸造并经历选定的最终表格。 将检查/测试标本的尺寸控制，前和TSP后微结构表征以及机械性能。 通过这种方法生产复杂的钛成分的能力可以节省大量的成本，从而更加广泛地使用钛。这项技术的更广泛影响将是一个新的铸造过程。如果成功的话，该技术可立即用于替换更昂贵的SPF用于锻造/加工结构，并允许更复杂和复杂的形状。 通过减轻体重（较薄的墙壁）以及相关支撑结构的体积和重量的减少，将会有所作为，从而增加了压力重量比和航空航天系统的整体燃油效率。