This webinar was presented in conjunction with the August, 2020 Journal of Materials Research Focus Issue on this topic, and it featured four talks from experts in the field, followed by live Q&A sessions with each.

Additive manufacturing (AM) is a disruptive technology, not only because it enables the production of components with complex geometries, but also because it provides unique opportunities for microstructure control and materials design. In contrast to conventional manufacturing technologies,such as casting, forging, and hot rolling, AM offers additional degrees of freedom to “architect” the material microstructure across many length scales. Owing to this unique capability, both beam-based processes—such as power bed fusion (PBF) and directed energy deposition (DED)—as well as non-beam-based processes—such as cold spray, additive friction stir deposition, and ultrasonic additive manufacturing—unlock new opportunities for tailoring mechanical and functional properties of metals and alloys.

In this webinar and associated JMR Focus Issue, we highlight research on the microstructures resulting from different AM processes and their impact on the mechanical and physical properties of metallic materials. The issue includes both experimental and modeling works focusing on different materials systems, such as steels, aluminum-,titanium-, and nickel-base alloys, refractory metals, and high entropy alloys. We have also captured a portion of the broad spectrum of research in AM, from finite element simulations and topology optimization to microstructure characterization and mechanical testing. Many new tools, such as machine learning methods, have become powerful for AM.

Talk presentations:

Microstructure and Texture in Metals Additive Manufacturing
Anthony Rollett, Carnegie Mellon University
Talk begins at 8:56

Materials and manufacturing renaissance: Additive manufacturing of high-entropy alloys
Atieh Moridi, Cornell University
Talk begins at 27:38

Heterogeneous microstructures and mechanical behavior of additively manufactured copper matrix composite
Qiang Guo, Shanghai Jiao Tong University
Talk begins at 50:24

Investigation of Process-Induced Defects in Additively Built Lattice Materials:
Material Microstructure and Morphological Variations
Damiano Pasini, McGill University
Talk begins at 1:17:42

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