Advanced Processing of Bulk Nanostructured Alloys from Machining Chips

利用加工碎片对块状纳米结构合金进行先进加工

• 批准号: 0500216
• 负责人: Kevin Trumble
• 金额: --
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0500216&HistoricalAwards=false
• 关键词: Advanced; Processing; Bulk; Nanostructured; Alloys

The objective of this research is to establish the feasibility of producing bulk nanostructured materials from machining chips by powder processing. It seeks to capitalize on the recent discovery of a low-cost means of producing nanostructured materials in essentially any metal or alloy. The discovery that chips produced during common machining operations are composed entirely of ultra-fine grained structures, provides an opportunity for making these materials in large volumes. The approach will employ advanced powder processing routes to explore consolidation of particulate derived from the nanostructured machining chips. Electron microscopy will be used to characterize the nanocrystalline structures. A key element of the research is to quantify the effect of thermal processing on microstructure coarsening; this should facilitate optimization of microstructure and properties of the bulk materials. Broad Impact and Intellectual Merit Nanostructured materials have been reported to exhibit significantly better properties than conventional materials, including higher hardness, strength and ductility. The high cost of creating these materials, however, has restricted their broad application. A fundamental understanding of consolidation and densification processes will be necessary before widespread use of any particulate nanostructured materials in the discrete products sector can be expected. An important secondary benefit, with broad societal impact, will be providing higher value utilization for machining chips produced in manufacturing operations. Complementing the research is an innovative education program, which builds on a strong interaction with an institution having a high enrollment of African-American students and includes summer undergraduate research internships.

这项研究的目的是确定通过粉末加工加工芯片生产块状纳米结构材料的可行性。 它试图利用最近发现的低成本手段在任何金属或合金中生产纳米结构材料。在普通加工操作过程中产生的芯片的发现完全由超细的谷物结构组成，为使这些材料大量制造提供了机会。该方法将采用先进的粉末加工路线来探索从纳米结构加工芯片中得出的颗粒物的合并。电子显微镜将用于表征纳米晶结构。 该研究的一个关键要素是量化热处理对微结构的影响的影响；这应该有助于优化体积材料的微观结构和性能。据报道，广泛的影响和智力优点纳米结构材料的性质明显优于常规材料，包括更高的硬度，强度和延展性。但是，创建这些材料的高成本限制了它们的广泛应用。 在预期离散产品部门中的任何颗粒纳米结构材料之前，必须对合并和致密过程的基本了解。具有广泛社会影响力的重要次要好处将为制造业生产的加工芯片提供更高的价值利用。 补充这项研究的是一项创新的教育计划，该计划是基于与非裔美国学生入学率高的机构进行牢固互动的基础，其中包括夏季的本科研究实习。