Seminar: "Metallic Laser Additive
Manufacturing" by Dr. Jay Choi
Wednesday, April 15, 2015 11:00 AM to 12:00 PM
CREOL Room 103
CREOL Room 103
Celebrating the International Year of Light 2015
Jay Choi, Ph.D.
Visiting Scholar, Center for Laser Aided Intelligent Manufacturing, University of Michigan, Ann Arbor Director, SenSigma, Ann Arbor, MI
Visiting Scholar, Center for Laser Aided Intelligent Manufacturing, University of Michigan, Ann Arbor Director, SenSigma, Ann Arbor, MI
Abstract:
Over the last two decades laser additive manufacturing (LAM)
technological communities have made considerable efforts, developing scientific
and technological elements necessary for rapid and reliable production of near
net shape components with desired properties and capabilities and with minimum
cost and lead-time possible. LAM technology has opened up alternative
possibilities for the manufacture of end-use components as well as the reuse of
legacy components. Metallic components are directly made from CAD
dimension by melting metal powders pixel-by-pixel utilizing a laser,
maintaining dimensional accuracy and material integrity utilizing a closed-loop
feedback control. Expanding LAM into high-value safety-stringent
applications, next-level of complexities and challenges, such as real-time
control of LAM to improve dimensional accuracy to minimize post-processing,
real-time minimization of residual stress, in-situ monitoring and control of
microstructure to obtain desired properties and performance, methodology to
derive desired mechanical properties, and real-time quality control through
in-situ inspection, need to be facilitated and addressed in terms of scientific
know-how and manufacturing efficiency. This presentation summarizes and
discusses LAM advancements throughout two decades of R&D efforts carried
out through lab environments and real-world settings, facilitating those
complexities.
Biography:
Dr. Choi has been overseeing R&D and engineering
directives including laser based manufacturing system design, sensor
technology, numerical analysis, process quality control, technology management,
and so on, regarding government/external R&D contracts, working as R&D
expert, faculty, and technical executive throughout academia (UIUC, UMich, and
MS&T) and industries: His engineering and R&D experiences/interests are
in the fields of advanced manufacturing (e.g. additive / formative /
subtractive manufacturing) utilizing laser, surface engineering/tribology,
instruments using lasers, rapid production realization, CAE/CAD, transport
phenomena in materials processing, and process modeling. He has over 20
years experiences of mechanical (including opto-mechanical / mechatronics) /
materials R&D in the area of materials processing, heat transfer, advanced
manufacturing, and laser processing system development. He has deeply
involved in developing advanced laser additive manufacturing techniques for
last 20 years. Dr. Choi has published more than 50 technical publications
in the area of laser processing, process modeling, and additive manufacturing
through refereed journals and conference proceedings. He has also
participated in several professional societies, such as ASME, LIA, ASTM, TMS,
ASEE, and so on. He got his BSME degree from Seoul National University
(Seoul, Korea), and his M.S./Ph.D. degrees from University of Illinois at
Urbana-Champaign.
For additional information:
Dr. Ranganathan Kumar: 407-823-4389
Dr. Martin Richardson: 407-823-6819
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