Self-Assembling Ductile and Tough Bulk Nanostructured Alloys of High Thermal-Stability

本研究的目的是开发一类新的合金，凭借其组成和变形处理可以导致最佳纳米结构材料的热驱动自组装。这种发展将首先集中在阐明热机械加工和相关的动力学的微观结构演变的原型三元合金系统之间的相互关系。电子显微镜将用于探索在这一演变过程中所需的纳米结构特征的自组装。随后，机械性能将通过速率相关的微米和纳米压痕实验和拉伸测试在一系列相关温度下的组合进行探测。最终，工艺方案将确定在一个可扩展的制造模式，有可能使大规模制造散装nanomaterial systems.To实现这项研究的潜在广泛影响，一个推广计划设想与国防制造和加工（NCDMM）的国家中心合作。NCDMM将与20多个联盟合作伙伴合作，通过将新兴材料技术转移到国防制造部门，在我们的研究实施中发挥关键作用。补充这些努力是一个教育和培训计划，其中包括纳米材料的新课程的开发，由NCDMM促进学生的工业实习，并让学生接触先进的电子显微镜和微量分析技术。

The objective of this research is to develop a new class of alloys that by the virtue of their composition and deformation processing can lead to the thermally driven self-assembly of an optimal nanostructured material. This development will first focus on elucidating the inter-relationship between thermo-mechanical processing and the associated kinetics of microstructure evolution in the prototypical ternary alloy systems. Electron microscopy will be employed for exploring the self-assembly of the requisite nanostructural characteristics during this evolution. Subsequently, the mechanical properties will be probed by a combination of rate-dependent micro and nanoindentation experiments and tension tests over a range of relevant temperatures. Ultimately, process schema will be identified within a scalable manufacturing paradigm to potentially enable the large-scale manufacture of bulk nanomaterial systems.To realize the potential broad impact of this research, an outreach program is envisaged in collaboration with the National Center for Defense Manufacturing and Machining (NCDMM). Working with more than 20 Alliance Partners, NCDMM will play a critical role in the implementation of our research by enabling the transfer of emerging materials technologies to the defense manufacturing sectors. Complementing these efforts is an education and training program that includes the development of a new course on nanomaterials, the creation of industrial internships for students that are facilitated by NCDMM, and exposing students to advanced electron microscopy and microanalysis techniques.