SGER: Laser Aided Direct Metal Deposition of Three- Dimensional Components: Dimension, Microstructure and Mechanical Properties

DMI-9633108 Mazumder这项探索性研究的小额赠款将调查H13工具钢零件的表面光洁度、尺寸精度和残余应力，该工艺被称为激光辅助直接金属沉积(LADMD)。这种快速成型技术的新方法的创新是通过直接金属沉积工具钢来制造。这使得有可能通过沉积而不是移除的方法来生产模具，例如模具和模具。对于那些使用这项技术进行工装的人来说，关键问题是工装的尺寸精度和残余应力状态，因为它们影响到工装的寿命和由工装生产的部件的配合。模具制造中的另一个问题是表面光洁度，这是大多数分层制造技术薄弱的地方，但表面光洁度对模具或模具型腔中部件的外观和材料的流动非常重要。该项目将提供尺寸精度、表面光洁度和残余应力的实验数据，通过使用LADMD生产和测量标准快速成型测试部件。材料评估将与制造和使用模具的Doehler Jervis和DCD Technology公司合作进行。这一新方法的影响将是缩短需要特殊工具的生产部件的制造周期，从而产生更具竞争力和定制化的产品，以满足客户需求。

DMI-9633108 Mazumder This Small Grant for Exploratory Research will investigate the surface finish, dimensional accuracy and residual stress in components made of H13 tool steel by a process called Laser Aided Direct Metal Deposition (LADMD). The innovation in this new approach to rapid prototyping technology is fabrication by direct metal deposition of tool steel. This makes it possible to produce tooling, for example, dies and molds, by deposition rather than removal methods. Key questions for those using this technology for tooling are the dimensional accuracy and residual stress state of tooling, because of their affect on the life of the tooling and fit of components produced by it. Another issue in die and mold manufacture is surface finish, a place where most of the layered manufacturing technologies are weak, but surface finish is important to the appearance of components and flow of material in a die or mold cavity. This project will provide experimental data on dimensional accuracy, surface finish, and residual stress, by producing and measuring a standard rapid prototyping test part using LADMD. Materials evaluation will be done in cooperation with Doehler Jervis and DCD Technology, firms that make and use dies. The impact of this new approach will be reductions in lead-time for the manufacture of production parts that need special tooling, leading to more competitive and customized products to satisfy customer needs.