MateriAlZ Seminar: Tresa Pollock
Friday, March 22, 2024 - 11:00 a.m. Arizona Time
Tresa Pollock
Alcoa Distinguished Professor of Materials
University of California, Santa Barbara
"Structure and Defect Development during Metal Additive Manufacturing from TriBeam Tomography"
Zoom link | Passcode: 689576
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Abstract
Additive manufacturing promises a major transformation of the production of high economic value metallic materials, enabling innovative, geometrically complex designs with minimal material waste. A major challenge for 3D printing of advanced metallic alloys is the control of structure and defects, which in turn control properties. TriBeam tomography, which integrates electron, ion and femtosecond laser beams to acquire high resolution chemical, structural and crystallographic information has been employed to study Ni- and CoNi-base printed materials. New insights on cell/dendrite and grain morphology evolution, misorientation accumulation, defect formation and melt pool dynamics will be reviewed. Future directions for the design of "printable" alloys will also be discussed.
Bio
Tresa Pollock is the Alcoa Distinguished Professor of Materials at the University of California, Santa Barbara. Pollock’s research focuses on the mechanical and environmental performance of materials in extreme environments, unique high temperature materials processing paths, ultrafast laser-material interactions, alloy design and 3-D materials characterization. Pollock graduated with a BS from Purdue University in 1984 and a PhD from MIT in 1989. She was employed at General Electric Aircraft Engines from 1989-1991, where she conducted research and development on high temperature alloys for aircraft turbine engines and co-developed the single crystal alloy René N6 (now in service). Pollock was a professor in the Department of Materials Science and Engineering at Carnegie Mellon University from 1991-1999 and the University of Michigan from 2000-2010. Professor Pollock was elected to the U.S. National Academy of Engineering in 2005, the German Academy of Sciences Leopoldina in 2015 and is a DOD Vannevar Bush Fellow and Fellow of TMS and ASM International. She serves as editor in chief of the Metallurgical and Materials Transactions family of journals, served as interim dean of the College of Engineering at UCSB from 2021-2023 and was the 2005-2006 President of The Minerals, Metals and Materials Society.