Understanding Metal Additive Manufacturing — Lesson 4

This lesson covers the fundamental concepts and terminologies related to metal additive manufacturing. It delves into the phenomena involved in the process, such as absorption, and the impact of various factors like heat source and gas absorption. The lesson also discusses the importance of AM guidelines and standards, analytical modeling, and the role of software in the process. It further explains different types of nozzles, the concept of cooling curves, and the significance of support structures in additive manufacturing. The lesson concludes with an introduction to electron beam as a powerful source in metal-based additive manufacturing.

Video Highlights

00:36 - Explanation of the phenomena of absorption in metal additive manufacturing and its impact on the process
09:55 - Explanation of the concept of capillary number in additive manufacturing
15:49 - Explanation of the concepts of coaxial and lateral nozzles in metal additive manufacturing
23:41 - Overview of the concept of cracking as a defect in metal additive manufacturing
29:06 - Overview of the concept of droplet formation in the DED process

Key Takeaways

- Absorption is a crucial phenomenon in metal additive manufacturing, affecting the process and the final product.
- AM guidelines and standards are essential for creating market-worthy products.
- Analytical modeling helps in understanding the science behind the process and making specific design decisions.
- Software plays a significant role in the additive manufacturing process, from 3D design to process simulation.
- Different types of nozzles, such as coaxial and lateral nozzles, are used in metal additive manufacturing.
- Cooling curves are important for understanding the transition of materials from liquid to solid state.
- Support structures are vital in additive manufacturing, and their design can impact the efficiency of the process.
- Electron beam is a powerful source used extensively in metal-based additive manufacturing.