Note: This is an archived event from 2016. Looking for this year's events?
October 5, 2016 4:00pm
Dr. Ibo Matthews of Lawrence Livermore Laboratory will speak on
"Characterization of laser-powder-bed interactions in selective laser melting"
Selective laser melting (SLM) plays an important role in the field of additive manufacturing, enabling the design of complicated geometries that can produce parts rapidly and efficiently. However, despite the significant advances in SLM, the detailed micro- and mesoscale descriptions of the energy coupling, heat flow and mass transport is still not completely available. Here, we directly measure the absorptivity of metal powder layers to characterize energy coupling efficiency and explore melt pool dynamics and motion of ejected particles using high speed imaging. The size of the melt pool and velocity of ejected particles (spatter) from the powder bed is extracted from individual camera frames, revealing new mass transport mechanisms. Finite element simulations were performed to give further insights into the physics of the laser-material interaction and open the pathway to process improvements.
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About ADAPT -
The Alliance for the Development of Additive Processing Technologies (ADAPT) is a research and development organization dedicated to the creation of next-generation data informatics and advanced characterization technologies for additive manufacturing technologies. ADAPT uses these tools to help industry and government qualify, standardize, assess, and optimize advanced manufacturing processes and parts. Several levels of membership to the ADAPT consortium are available. Founding industry members include Ball Aerospace & Technologies Corp., Faustson Tool, Lockheed Martin, Citrine Informatics. Grant funding from the Colorado Office of Economic Development & International Trade (OEDIT) was provided to Manufacturer’s Edge and The National Institute of Standards and Technology’s Hollings Manufacturing Extension Partnership. For more information, find ADAPT on the web, LinkedIn, Facebook, or Twitter.