Online Lecture by Prof. Amy Clarke

Science-based Advanced Manufacturing of Metals and Alloys

¹⁾Los Alamos National Laboratory, Sigma Manufacturing Science Division, Los Alamos, NM, 87545, USA

²⁾Colorado School of Mines, Department of Metallurgical and Materials Engineering, Golden, CO, 80401, USA

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Title:
Science-based Advanced Manufacturing of Metals and Alloys.

Abstract:
Solidification is the first step encountered during the processing of metals and alloys. Significant opportunity exists to not only employ conventional processes like metal casting, but also emerging processes like additive manufacturing (AM) that typically produce large temperature gradients, high solidification rates, and repeated cycles of heating and cooling.

The local conditions experienced during solidification processes (e.g., thermal gradients and solid-liquid interface velocities) dictate microscopic structure (i.e., microstructure) evolution. Here we visualize solidification dynamics during metal casting, directional solidification, and simulated AM by real-time imaging with protons, synchrotron x-rays, and electrons and computational modeling to link processing conditions to microstructure development.

We also explore the role of subsequent solid state phase transitions on final microstructural state. A deeper understanding of phase transitions is needed to optimize processing conditions, predict and control microstructure evolution, and achieve advanced manufacturing of metals and alloys.

This session was chaired by Joakim Odqvist (KTH).

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