Understanding Additive Manufacturing for Metal Matrix Fabrication — Lesson 3

This lesson covers the process of additive manufacturing for metal matrix fabrication. It delves into the differences between conventional and additive manufacturing of metal matrix composites, focusing on the microstructure. The lesson also discusses the selection of matrices and reinforcements, with a focus on iron, aluminum, titanium, and nickel. It further explores the applications of these materials in various industries, including automobile, aerospace, and biomedical. The lesson also explains the role of laser parameters in achieving good interfacial bonding and uniform dispersion. It concludes with a discussion on the applications of nickel-based metal matrix composites using additive manufacturing.

Video Highlights

00:36 - Discussion on the difference between conventional and additive manufacture metal matrix composites
03:51 - Discussion on the use of iron oxide in aluminum for making composites
09:38 - Explanation of the effect of SiC particle size on the composite densification
13:29 - Discussion on the use of TiB2 in laser, AlSi Mg, and AlSi for improving aluminum alloys' mechanical property
17:39 - Explanation of the formation of Mg and Al6 intermetallic phase along the grain boundaries and within the grain in the laser processing of AA7075 TiB2 composite
22:15 - Explanation of the formation of NbC at inter inter dendritic region in Inconel 625 TiC composite

Key Takeaways

- Additive manufacturing is a useful method for creating metal matrix composites.
- The choice of matrix and reinforcement materials is crucial and depends on factors such as ductility, density, and wear resistance.
- Laser parameters play a significant role in achieving good interfacial bonding and uniform dispersion.
- Aluminum and nickel are commonly used in metal matrix composites due to their properties and applications.
- Nickel-based metal matrix composites have specific applications in additive manufacturing.