Combinatoric alloy development, casting and thermomechanical Optimization of high-temperature shape memory alloys

高温形状记忆合金的组合合金开发、铸造和热机械优化

• 批准号: 222154862
• 负责人: Professor Dr.-Ing. Jan Frenzel
• 金额: --
• 依托单位: Institut für Werkstoffkunde (IW)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/222154862?language=en
• 关键词: Combinatoric; alloy; development; casting; thermomechanical

The project aims at substantially improving the properties of high-temperature shape memory alloys based on Ti-Ta and Co-Ni-Ga by chemical and microstructural modifications. In the first phase of the project Ti-rich compositions with high transformation temperatures were identified. These composi-tions are the basis for developing new alloys with better functional stability and better (thermo-) me-chanical properties. For this, methods of combinatorial materials science (thin films) together with processes for the production and characterization of bulk materials will be applied. Thin film materials libraries, containing large continuous ranges of ternary and quaternary alloy systems, will be fabricat-ed by magnetron sputtering and will be characterized using adequate high-throughput methods with the aim of efficiently identifying compositions with special properties, phases and structures. Hit-compositions will be then fabricated and characterized in bulk form. The project aims at a better un-derstanding of thermodynamic and kinetic aspects of phase formation in high temperature shape memory alloys. It will be investigated, which phases appear under which conditions, and how this affects shape memory properties. Both, for Ti-Ta- and Co-Ni-Ga-based alloys the project will investigate how microstructures of these materials can be modified for improving the functional properties. Therefore, an understanding of elemental microstructural processes will be developed. Finally, research on shape setting will be performed as well as thin film and bulk demonstrators will be developed and characterized.

该项目旨在通过化学和微观结构修饰基于Ti-Ta和Co-Ni-GA基于Ti-Ta和Co-Ni-GA的高温形状存储合金的特性。在项目的第一阶段中，鉴定出高变化温度的富含组合物。这些组合是开发具有更好功能稳定性和更好（热）质量特性的新合金的基础。为此，将采用组合材料科学（薄膜）的方法，以及用于生产和表征批量材料的过程。薄膜材料文库包含大型三元和第四纪合金系统的较大连续范围，将由木ement子溅射进行织物 - 将使用足够的高通量方法来表征，以有效地识别具有特殊特性，相，结构和结构的构图。然后，将制造命中式组成并以散装形式进行表征。该项目的目的是更好地说明高温形状记忆合金中相形成的热力学和动力学方面。它将进行研究，在哪些条件下显示哪个阶段，以及如何影响形状的记忆特性。对于Ti-Ta-和Co-Ni-Ga的合金，该项目都将研究如何修改这些材料的微观结构以改善功能性能。因此，将了解对元素微结构过程的理解。最后，将对形状设置进行研究，并将开发和表征薄膜和散装示威者。