Understanding Phase Diagrams in Metal Additive Manufacturing — Lesson 4

This lesson covers the importance of phase diagrams in metal additive manufacturing, focusing on various alloys such as Iron-Carbide, Aluminium, Titanium, and Nickel. It explains how different phases like alpha, beta, gamma, martensite, and austenite can be derived from these diagrams and how they influence the microstructure and service condition of the part. The lesson also discusses how varying temperatures and compositions can result in different microstructures, using the Iron-Carbide diagram as an example. It further explores the phase diagrams of Aluminium-Nickel, Titanium, and Nickel alloys, which are extensively used in additive manufacturing.

Video Highlights

00:40 - Importance of phase diagrams in understanding different phases in alloys
01:49 - Detailed explanation of the Iron and Carbide diagram
09:52 - Explanation of the phase diagram of Aluminium alloy
14:52 - Explanation of the Nickel alloy phase diagram

Key Takeaways

- Phase diagrams are crucial in understanding the different phases that can occur in alloys during metal additive manufacturing.
- These diagrams dictate the microstructure, which in turn defines the service condition of the part.
- Different phases like alpha, beta, gamma, martensite, and austenite can be derived from these diagrams.
- Varying temperatures and compositions can result in different microstructures.
- The Iron-Carbide diagram is a common example used to illustrate these concepts.
- The phase diagrams of Aluminium-Nickel, Titanium, and Nickel alloys are also discussed, highlighting their use in additive manufacturing.