Collaborative Research: Nanostructured Alloys With Unprecedented Properties

摘要合作研究：具有前所未有性能的纳米结构合金。Y. Yang（UCSB）、Srinivasan Jumrasekar（Purdue）和W.戴尔·康普顿（普渡大学）UCSB-普渡大学合作利用了最近发现的一种大规模生产纳米结构材料的方法。该方法通过使用类似于机械加工的受控表面变形过程来诱导毫米级的大塑性应变。直接制造宏观尺寸的箔、线和片材形式的材料是可行的。这些材料的机械强度是母体材料的三倍。 纳米结构的形成是由变形系统施加的非常高的应变的结果。这项合作利用了这些发现，有两个协调的推力。首先，可控制的变形参数的宽范围将允许参数的系统检查（例如，应变、应变速率）影响纳米晶体结构的形成。其次，将开发大应变变形过程中微观结构细化的模型，以评估应变、温度和材料转变的相互作用。通过整合这些推力，将开发协议，通过具有成本效益的制造工艺开发新的属性组合。 已经寻求在结构应用中广泛使用纳米结构合金;然而，制造这些材料的成本（报价超过每磅一百美元）限制了它们的广泛应用。这项研究将为理解大应变变形过程中纳米结构的细化作为一种重要的科学现象，以及在生物医学，地面交通和能源部门的产品中利用纳米结构材料之间提供重要的桥梁。 与一家快速发展的先进材料公司和一家初创企业的互动将促进向应用程序的过渡，这两家公司都对先进材料和微/中尺度系统有市场兴趣。补充研究是一个教育计划，具有工业实习的研究生，本科生研究实习和强大的互动与行业和国家实验室。

AbstractCOLLABORATIVE RESEARCH: NANOSTRUCTURED ALLOYS WITH UNPRECEDENTED PROPERTIESHenry T. Y. Yang (UCSB), Srinivasan Chandrasekar (Purdue) and W. Dale Compton (Purdue) The UCSB-Purdue collaboration capitalizes on the recent discovery of a method for large-scale production of nanostructured materials. The method induces large plastic strains at the millimeter-scale by using a controlled surface deformation process analogous to machining. Direct manufacture of the materials in the form of foil, wire, and sheet of macroscopic dimensions is feasible. The materials have mechanical strength up to three times that of the parent material. The formation of the nanostructures is a consequence of the extraordinarily high strains imposed by the deformation system. The collaboration exploits these discoveries with two coordinated thrusts. First, the wide range of controllable deformation parameters will allow for systematic examination of the parameters (e.g., strain, strain rate) affecting the formation of nanocrystalline structures. Second, models will be developed for microstructure refinement during large strain deformation to assess the interactive role of strain, temperature and material transformations. By integrating these thrusts, protocols will be developed for developing novel property combinations by cost-effective manufacturing processes. Widespread use of nanostructured alloys in structural applications has been sought; however, the cost of creating these materials, quoted in excess of one hundred dollars per pound, has restricted their broad application. The research will provide an important bridge between the understanding of nanostructure refinement during large strain deformation as an important scientific phenomenon, and the utilization of nanostructured materials in products in the bio-medical, ground transportation and energy sectors. The transition to applications will be facilitated by interactions with a rapidly growing advanced materials company and a start-up, both with market interests in Advanced Materials and Micro/Meso Systems. Complementing the research is an education program featuring industrial internships for graduate students, undergraduate research internships and strong interactions with industry and National Labs.