STTR Phase I: New Process for High Strength/Weight Net-Shape Auto and Aero components from Mg Sheet

该小企业技术转让（STTR）第一阶段项目旨在开发一种新的低成本工艺来制造纳米结构净形镁零件。这些轻量化和高强度的部件有望成为纳米技术在汽车、航空航天和许多其他行业中的成本效益应用。该工艺（本文称为TS）结合了注塑成型（触变成型）和正弦波变形。 所得材料易于通过温拉伸或超塑性成形（SPF）形成复杂形状。TS产生新的微观结构和微观机制，由我们的大学合作伙伴进行探索。 该工艺引入了两种协同强化机制，在散装零件中原位产生-晶粒尺寸细化和金属间化合物颗粒细化。纳米分散体强化了纳米颗粒，为学习新的科学提供了机会。 消除阻碍当前商业Mg片材的延展性和可成形性的机制的能力构成了对加工科学的新贡献。TS工艺为最大限度地减少汽车和航空航天器的能源/燃料消耗开辟了道路;减轻了军事人员的负担。 该流程将围绕自动化制造单元进行设计，该单元将具有灵活性，可在当天交付定制选择的合金和零件几何形状。 TS工艺是环保的，没有炉渣、浮渣、全球变暖气体以及火灾和安全隐患。

This Small Business Technology Transfer (STTR) Phase I Project is aimed at developing a new low-cost process to manufacture nanostructured net-shape Mg parts. These lightweight and high strength parts are expected to be cost-effective applications of nanotechnology in automotive, aerospace and many other industries. The process (herein termed TS) combines injection molding (Thixomolding) and Sinewave deformation. The resulting material is readily formed into complex shapes by warm drawing, or superplastic forming (SPF). TS generates novel microstructures and micromechanisms to be explored by our University partner. The process introduces two synergistic mechanisms for strengthening, generated in-situ in bulk parts - grain size refinement and intermetallic particle refinement. The nano-sized dispersoids that fortify the nano-sized grains provide opportunity for learning new science. The ability to eliminate mechanisms that hinder the ductility and formability of current commercial Mg sheet constitutes a novel contribution to processing science. The TS process opens the way to minimize energy/fuel consumption in autos and aerospace vehicles; to lessen the burden of military personnel. This process will be designed around an automated manufacturing cell that will feature agility for same day delivery of custom selected alloy and part geometry. The TS process is environmentally friendly, free of slag, dross, global warming gases and fire and safety hazards.