SBIR Phase I: Manufacture of Structural Magnesium MMC with Nanoparticles by Friction Stir Processing

这个小型企业创新研究(SBIR)第一阶段项目旨在开发一种低成本制造技术，用于生产车辆和飞机结构应用的高强度、抗蠕变的镁材料。通过在金属基质中引入纳米颗粒(NPs)，镁的性能得到了显著的改善。目前制备纳米颗粒增强金属基复合材料(NPMMC)的技术涉及多个加工步骤，导致高制造成本或导致纳米颗粒增强体的聚集和团聚。因此，镁纳米复合材料在商业结构中的广泛应用受到了严重的限制。我们将研究一种新的摩擦搅拌工艺生产结构用镁NPMMC的可行性？？S。这项研究的第一阶段将专注于提高镁合金的强度和抗蠕变性能，以便在第二阶段实现规模化和商业化。这项研究的目标是生产适合于结构应用的板材和中间合金材料。板材可进一步加工成板材、管材、锻造毛坯和机加工零件。具有高体积百分比纳米颗粒的材料将被用作铸造操作中的主合金，以生产大型网状部件。该项目的更广泛的影响/商业潜力涉及汽车和航空航天行业的燃料消耗和有害排放的减少。减轻车辆和飞机的总体重量是实现这些目标的关键，而镁合金的低密度往往是一个可行的建议。然而，镁的力学性能和高温蠕变性能相对较差，限制了镁的广泛应用。拟议的努力将显著降低结构镁组件的制造成本，使其在汽车和航空航天行业得到广泛应用。此外，开发的制造技术将为结构汽车零部件制造商提供相对于外国竞争的成本优势。

This Small Business Innovation Research (SBIR) Phase I project aims to develop a low-cost fabrication technique for producing high-strength, creep-resistant magnesium material for structural applications in vehicles and aircraft. The properties of magnesium are significantly improved by introducing nanoparticles (NPs) into the metal matrix. Current techniques for producing nanoparticle-reinforced metal matrix composites (NPMMCs) involve multiple processing steps leading to high manufacturing cost or result in the clustering and agglomeration of the nanoparticulate reinforcement. As a result, the widespread application of magnesium nanocomposites in commercial structural applications has been severely restricted. We will investigate the feasibility of a novel friction stir process (FSP) for producing magnesium NPMMC?s for structural applications. Phase I of this research will focus on improving the strength and creep resistance of magnesium alloys so that scale-up and commercialization can be pursued in Phase II. The goal of this research is to produce material suitable for structural applications in the form of plate and master alloy material. The plate material can be further processed into sheet, tubes, forged blanks and machined parts. Material with a high volume percentage of nanoparticles will be used as a master alloy in casting operations to produce large net shaped components.The broader impact/commercial potential of this project is concerned with the reduction of both fuel consumption and harmful emissions in the automotive and aerospace industries. Reducing the overall weight of vehicles and aircraft is key to achieving these goals and magnesium alloys, with their low density, can often be a viable proposition. However, the widespread use of magnesium is limited by its relatively poor mechanical and high temperature creep properties. The proposed effort will significantly reduce the cost of fabrication of structural Mg components, enabling widespread application in the automotive and aerospace industries. Additionally, the manufacturing technology developed will provide a cost advantage over foreign competition to manufacturers of structural automotive parts.