PFI:AIR: - TT: Forming Metals Like Plastics: Thermoplastic Blowmolding of Metallic Glasses

PFI:AIR: - TT：像塑料一样成型金属：金属玻璃的热塑性吹塑成型

• 批准号: 1601867
• 负责人: Jan Schroers
• 金额: $ 20万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-05-01 至 2018-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1601867&HistoricalAwards=false
• 关键词: PFI; AIR; TT; Forming; Metals

This PFI: AIR Technology Translation project focuses on translating the ability to thermoplastically form metallic glasses like plastics to fill the need of net-shaping metals. Net-shaping, a process that shapes a material in one processing step into its final shape, is well established for thermoplastics, but thermoplastics are too weak for most structural applications. In structural applications that are critical, such as aerospace, automotive, and hard-tissue replacements, metals are typically used. Forming of metals, however, has been limited. This project will combine metal-like properties and plastic-like processing. Particularly, thermoplastic based blow-molding and stretch blow-molding, will be translated during this project from a scientific discovery into a technological process, which can meet the need for a metal net-shape process. These blow-molding processes have potentially vast commercial ramification as they could replace many of the currently used metal processing methods, and hence replace many of the applications currently occupied by metals and plastics. In order to reach such a translation, this project will determine processing parameters that are required for a commercial fabrication process. In addition, a commercial viability study will be carried out considering capital investment, processing time, and materials costs. As a product, a commercial apparatus and processing procedure will be determined in consultation with equipment manufacturers. Specifically, cycle time will be minimized, and processing conditions optimized for speed, energy efficiency, and robustness. Considering the redundancy of machining, joining, and other finishing procedures, and taking into account the processing speed and accuracy, blow-molding of metallic glasses is envisioned to replace currently used materials and processes used for electronic casings. This project addresses the following technology gap(s) as it translates from research discovery toward commercial application. The effect of high strain rate on the deformation behavior is not well understood. Particularly, if the metallic glass forming liquid remains to behave like a Newtonian liquid as strain rates exceeding 0.1/sec. Accurate understanding of the deformation behavior, the metallic glasses' response to temperature and pressure is crucial for future modeling of mold filling during blow-molding and stretch blow-molding. How the high strain rates effects the mechanical properties of the metallic glass also will be investigated. Bending experiments will be conducted and the strain to failure will be used as a quantitative measure for bending ductility. Involved personnel include graduate students, post-docs, undergraduate students, and visiting undergraduate students. They will be exposed to the whole range of technological development; from fundamental science of determining the deformation behavior, to engineering aspects of developing appropriate processes and machinery, to commercial and business aspects of viability and comparison studies. Students will be exposed to the state of the art metallurgy processes and characterization methods and will also develop a deeper understanding of the connection between science, innovation, and entrepreneurial skills.

该PFI：空气技术翻译项目的重点是翻译热层状形成金属玻璃（如塑料）以满足净形状金属的需求的能力。净形象是将材料以一个处理步骤塑造到最终形状的过程，对于热塑性塑料已经很好地确定，但是对于大多数结构应用而言，热塑性塑料太弱了。在关键的结构应用中，例如航空航天，汽车和硬组织更换，通常使用金属。然而，形成金属是有限的。该项目将结合金属状的特性和类似塑料的处理。尤其是，基于热塑性的吹式造成和拉伸的吹制，将在该项目中将科学发现转换为技术过程，该过程可以满足金属净形状工艺的需求。 这些打击过程可能具有巨大的商业影响，因为它们可以取代许多当前使用的金属加工方法，因此取代了当前由金属和塑料占用的许多应用程序。为了达到这种翻译，该项目将确定商业制造过程所需的处理参数。此外，考虑资本投资，处理时间和材料成本，将进行一项商业可行性研究。作为产品，将与设备制造商协商确定商业设备和处理程序。具体而言，周期时间将被最小化，并针对速度，能效和鲁棒性进行了优化的处理条件。考虑到加工，连接和其他完成程序的冗余，并考虑到处理速度和准确性，可以预见，金属玻璃的打击量可以替换当前使用的用于电子外壳的材料和过程。该项目解决了以下技术差距，因为它从研究发现转化为商业应用。高应变速率对变形行为的影响尚不清楚。特别是，如果金属玻璃形成液体仍然像牛顿液体一样行为，而应变速率超过0.1/秒。对变形行为的准确了解，金属眼镜对温度和压力的反应对于在吹击和拉伸吹动过程中对模具填充的未来建模至关重要。 高应变速率如何影响金属玻璃的机械性能。将进行弯曲实验，并将失败的应变用作弯曲延展性的定量度量。涉及的人员包括研究生，学后，本科生和来访的本科生。他们将暴露于整个技术发展范围。从确定变形行为的基本科学，到开发适当流程和机械的工程方面，再到可行性和比较研究的商业和业务方面。学生将接触到最先进的冶金过程和表征方法，还将对科学，创新和企业家技能之间的联系有更深入的了解。