STTR Phase I: Novel Consolidation Method for Nanostructured Metals

STTR 第一阶段：纳米结构金属的新型固结方法

• 批准号: 0637989
• 负责人: Douglas DuFaux
• 金额: --
• 依托单位: NanoDynamics, Inc (NDI)
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0637989&HistoricalAwards=false
• 关键词: STTR; Phase; Novel; Consolidation; Method

This Small Business Technology Transfer (STTR) Phase I project will demonstrate the feasibility of producing nanostructured metals in a form that can be ultrasonically welded together. Sample coupons will be manufactured and the weld zone structure analyzed to determine the effects of ultrasonic metal welding on the grain structure.Traditional powder metallurgy consolidation techniques that result in a dense product tend topromote grain growth. While usually this is not a concern, nanostructured powders will then tend to loose their intrinsic enhanced properties. For example, decreasing the crystalline grain size of metals makes them harder and stronger, and nanosized grains is the next goal for bulk materials. Furthermore, less energetic consolidation techniques that maintain the nanostructured phase leave detrimental porosity. Either way, the purported benefits of the nanostructuring is not fully realized in bulk forms. Nanodynamics has technology, high velocity deformation, to produce nanostructured metals in larger than powder forms. It is based upon conventional machining processes such as milling and lathing, and is inherently low cost. Teaming as a research partner, the Edison Welding Institute is a leader in ultrasonic metal welding, which is a low temperature process. As it is low temperature process, it does not promote grain growth in materials used to date. Commercially, one of the most important goals in manufacturing is to develop the next generation of enhanced materials for component and product improvement. Nanotechnology is widely seen as one of the methods whereby enhanced materials can be developed. Specific to the proposed research, nanostructured metals hold promise to provide enhanced properties such as strength and hardness. Incorporating these materials into existing assemblies can extend the useful operational envelope of the finished products, or permit weigh reductions as less material is required to fulfill the same function. For example, the transportation industries, especially automotive and aerospace, are always desirous of such materials. Weight reductions garner greater fuel efficiencies and cost savings. Increased strength provides greater functional utility and safety. It will also be interesting to investigate if there may be as yet unforeseen other benefits, such as increased corrosion resistance.

这个小型企业技术转移（STTR）I期项目将证明可以以超声焊接的形式生产纳米结构金属的可行性。样品优惠券将制造，并分析了焊接区结构，以确定超声金属焊接对晶粒结构的影响。传统粉末冶金巩固技术导致浓密的产物趋于浓粒晶粒的生长。尽管这通常不是一个问题，但纳米结构的粉末会倾向于松散其内在的增强特性。例如，减小金属的结晶晶粒尺寸会使它们越来越坚固，纳米颗粒是散装材料的下一个目标。此外，维持纳米结构相位的有害孔隙度的能量较低的巩固技术。无论哪种方式，纳米结构所据称的好处均未以批量形式完全实现。纳米动力学具有高速变形的技术，可生产大于粉末形式的纳米结构金属。它基于常规的加工过程，例如铣削和车载，并且本质上是低成本。爱迪生焊接研究所（Edison Welding Institute）是研究合作伙伴，是超声金属焊接的领导者，这是一个低温过程。由于它是低温过程，因此不会促进迄今为止使用的材料的谷物生长。从商业上讲，制造业中最重要的目标之一是开发下一代增强的材料，以改善组件和产品。纳米技术被广泛视为可以开发增强材料的方法之一。纳米结构的金属特有拟议的研究，有望提供增强的特性，例如强度和硬度。将这些材料纳入现有的组件可以扩展成品的有用操作信封，或者允许减少重量，因为需要较少的材料才能实现相同的功能。例如，运输行业，尤其​​是汽车和航空航天，总是希望使用此类材料。减轻重量的燃油效率和节省成本的提高。增加强度提供了更大的功能效用和安全性。调查是否可能还没有其他好处，例如增加耐腐蚀性，这也将很有趣。