Understanding Metal Additive Manufacturing - 1 — Lesson 1

This lesson covers the intricate details of Metal Additive Manufacturing, focusing on the powder bed fusion method. It delves into the different process parameters required to run a machine and their influence on the output. The lesson also discusses beam scanning strategies, parameters for powder bed fusion, directed energy deposition, and the properties of powder for these methods. It further explains the methods of powder particle production and their influence on the shape, size, and topology of the powder particles. The lesson concludes with a discussion on supporting structures for the powder bed fusion method.

Video Highlights

00:14 - Introduction to the lecture on Metal Additive Manufacturing, focusing on powder bed fusion method and process parameters
04:19 - Discussion on the importance of beam power and layer thickness in the additive manufacturing process
08:54 - Discussion on the importance of laser strength and shielded gas in the additive manufacturing process
14:24 - Discussion on the importance of support structures in the powder bed fusion method
27:31 - Explanation of the importance of powder properties in the powder bed fusion and directed energy deposition processes
42:52 - Discussion on the importance of wire properties in the directed energy deposition process
48:31 - Explanation of the importance of ambient parameters in the powder bed fusion and directed energy deposition processes

Key Takeaways

- Mechanical properties of additive manufacturing printed parts and alloys are crucial in determining the quality of the manufactured part.
- Porosity significantly affects cracking and mechanical properties, and it can be measured through non-destructive testing methods.
- Hardness, tensile strength, static strength, and fatigue behavior are important parameters in evaluating the quality of metal additive manufactured parts.
- The process parameters and the combination of materials used in additive manufacturing can significantly influence the mechanical properties of the manufactured part.
- Post-processing treatments such as heat treatment and annealing can affect the hardness and strength of the additive manufactured part.