SBIR Phase I: Casting Technology for High Temperature Titanium Alloy Lattice Block Structures

SBIR第一期：高温钛合金晶格块结构铸造技术

• 批准号: 0420252
• 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 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0420252&HistoricalAwards=false
• 关键词: SBIR; Phase; Casting; Technology; Temperature

This Small Business Innovative Research (SBIR) Phase I project will produce high temperature titanium alloy lattice block materials (LBM) via casting. Lattice block materials are innovative periodic cellular materials that derive their outstanding mechanical performance from a structure of highly ordered internal triangles, rather than the properties of the parent material. To date, these engineered materials have been successfully cast for a number of ferrous and non-ferrous metals. For titanium alloys, only limited work has been done, mainly on compositions that are used at moderate temperature ranges. As higher temperature titanium alloys such as beta titanium are increasingly becoming the materials of choice for high temperature airframe and aero engine applications. Beta titanium alloys are extremely difficult to cast into complex and thin-walled shapes due to factors, including a propensity for forming shrinkage at the centerline of sections. Thus, a unique casting technology is being developed to make it possible to produce high temperature titanium alloy LBM. Potential applications include aircraft and spacecraft structures, including thermal protection systems, as well as aircraft and automotive engine components.The broader impacts derived from this technology would be Ti-LBM opportunities for weight and cost reduction for use in in future aerospace and non-aerospace systems. Ti-LBM can be used to replace more expensive honeycomb and sandwich structures built up from thin sheets/foils via hot forming, diffusion bonding, and superplastic forming. LBM made from high temperature Ti alloys would be capable of replacing lower temperature Ni-based superalloys for significant weight savings.

该小型企业创新研究（SBIR）第一阶段项目将通过铸造生产高温钛合金网格块材料（LBM）。晶格块材料是创新的周期性蜂窝材料，其优异的机械性能来自高度有序的内部三角形结构，而不是母体材料的特性。迄今为止，这些工程材料已成功地用于许多黑色金属和有色金属的铸造。对于钛合金，只做了有限的工作，主要是在中等温度范围内使用的成分。随着高温钛合金如β钛越来越多地成为高温机体和航空发动机应用的首选材料。β钛合金极难铸造成复杂的薄壁形状，这是由于多种因素造成的，包括在截面中心线处形成收缩的倾向。因此，正在开发一种独特的铸造技术，以使生产高温钛合金LBM成为可能。潜在的应用包括飞机和航天器结构，包括热防护系统，以及飞机和汽车发动机部件。这项技术带来的更广泛的影响将是钛-LBM在未来航空航天和非航空航天系统中使用的重量和成本降低的机会。Ti-LBM可用于替代更昂贵的蜂窝和夹层结构，这些结构由薄板/箔通过热成形、扩散结合和超塑性成形而构建。由高温钛合金制成的LBM将能够取代较低温度的镍基高温合金，从而显着减轻重量。