Canceled: MABE Seminar: Addressing Complexity in Advanced Manufacturing
Presenter: Bradley H. Jared, Principal Member of Technical Staff, Material, Physical and Chemical Sciences Center, Sandia National Laboratories, Albuquerque, NM
“Complexity is free” has been an oft-cited refrain during the recent renaissance of manufacturing, typically referencing additive manufacturing (AM). To be sure, however, advanced manufacturing techniques make complexity available as new materials, processes and part topologies are realized enabling performance gains inaccessible through traditional means. Such gains will be discussed in the context of ultra-fast laser processing, precision machining and laser-powder bed fusion (L-PBF). Application examples include meso-scale springs, freeform optics, topology optimized structures and hierarchical materials for impact mitigation. The development of physics-based engineered controls and automation methodologies are preferred to satisfy requirements by optimizing process performance, by minimizing output uncertainties, and by increasing product throughput.
Research on L-PBF will be presented to address these process complexities and performance uncertainties. Initial material behavior mimicked an open loop state as properties varied widely and proved difficult to anticipate. Work has since quantified important process-structure-property relationships for powder feedstocks, laser settings and machine components. Machine improvements and metrology procedures have also been developed, producing an increase in process consistency and material confidence. Continued research is examining in-situ melt pool dynamics and exploring advanced data analytic techniques (ex. machine learning) to correlate melt pool outliers to process defects.
Dr. Bradley H. Jared is a Principal Member of the Technical Staff at Sandia National Laboratories where he leads advanced manufacturing research and development within the Material, Physical and Chemical Sciences Center. His Sandia research has supported applications for optics, photonics, micro-photovoltaics, satellites and weapon systems as he has led efforts in mechanical design, meso-machining, diamond turning, metrology, ultrafast pulsed laser processing and metal additive manufacturing. He received a B.S. in mechanical engineering from the University of Tennessee-Knoxville, and M.S. and Ph.D. degrees in mechanical engineering from North Carolina State University. He spent almost a decade in industry prior to joining Sandia performing research in precision fabrication, design and assembly to support photonic and life science products at Corning and consumer display products at 3M. He has almost 25 years of experience in mechanical design and advanced manufacturing process development; having presented and published work in the fields of ultra-precision machining, metrology, ultrafast pulsed laser processing and additive manufacturing.
Thursday, March 26, 2020 at 11:15am to 12:15pm
Dougherty Engineering Building, 409
1512 Middle Drive, Knoxville, TN 37996