Faculty Candidate Seminar
Title: |
Data Analytics for Studying the Micromechanics and Manufacturing of Polycrystals |
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Speaker: |
Dr. Aaron Stebner |
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Affiliation: |
Colorado School of Mines |
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When: |
Monday, November 18, 2019 at 2:00:00 PM |
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Where: |
MRDC Building, Room 4211 |
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Host: |
Min Zhou, Tequila Harris | |
Abstract Abilities to study and observe the deformation and processing of polycrystals are rapidly advancing as more powerful probes, sensors, and data management and analyses capabilities are developed. The integration of data analytics to create these abilities will be introduced in this seminar. First, the development of three-dimensional X-ray diffraction techniques for studying the micromechanics of phase transformations, twinning, and plasticity during deformation of polycrystals will be reviewed. Second, the need for physics-informed feature engineering to use machine learning to model the chemistry and processing of alloys will be demonstrated through shape memory alloy heat treatment and laser powder bed fusion of Ti-64 example problems. Finally, the adaptation of spatial frequency modulation for imaging, SPIFI, a new femtosecond laser imaging technique, will be shown to solve many of the challenges for in situ process monitoring of laser powder bed fusion additive manufacturing of metals. Furthermore, the femtosecond laser source may be simultaneously used for ablative machining and surface modifications within the powder bed. |
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Biography Aaron Stebner is the Executive Director of the Alliance for the Development of Additive Processing Technologies, ADAPT, a 20-member academic–industry research consortium for data informatics technologies to advance metals additive manufacturing. He received his BS and MS from the University of Akron, his PhD from Northwestern University and a Graduate Certificate in Management from Kellogg School of Management. He was a postdoctoral scholar at the Graduate Aerospace Laboratories of the California Institute of Technology. In between degrees, he worked at the Electric Device Corporation in Canfield, Ohio, developing manufacturing and automation technologies for the circuit breaker industry; at NASA Glenn Research Center developing smart materials technologies for morphing aircraft structures; and at Telezygology Inc. establishing manufacturing and “internet of things†technologies for shape memory alloy-secured latching devices. Stebner also consults regularly for shape memory alloy and additive manufacturing medical and aerospace industries. He has won numerous awards, including an NSF-Career award in 2014, Economic Developer of the Year award for Jefferson County, Colorado in 2016, the Colorado School of Mines Researcher of the Year Award in 2017, and a Visiting Professor Fellowship from the Japan Society for the Preservation of Science in 2019. Stebner serves as a board member of the ASM International Organization on Shape Memory and Superelastic Technologies, SMST, and as an international advisory committee member of the International Conference on Martensitic Transformations ,ICOMAT. His research group is part of the joint industry-government–academia Consortium for the Advancement of Shape Memory Alloy Research and Technology,CASMART. Stebner also performs research projects in the DOE-sponsored IACMI Manufacturing USA Institute. |
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Notes |
Refreshments will be served. |
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