TY - GEN
T1 - Linking thermal history to mechanical behavior in directed energy deposited materials
AU - Cao, Jian
N1 - Funding Information:
Acknowledgements This works acknowledges the support by the National Institute of Standards and Technology (award no. 70NANB13H194), Center for Hierarchical Materials Design (CHiMAD, award no. 70NANB14H012), and Digital Manufacturing and Design Innovation Institute (DMDII, award no. 15-07). Northwestern University professors Kornel Ehmann, Wing Kam Liu, Gregory J. Wagner and students Sarah Wolff, Hao Wu, David Pritchet, Stephen Lin, Orion Kafka, Jennifer Bennett, Puikei Cheng, Cheng Yu and Haiguang Liu contributed to this work. This work made use of facilities at Northwestern University, Quad City Manufacturing Laboratory, DMG MORI and the Advanced Photon Source at Argonne National Laboratory.
Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2019.
PY - 2019
Y1 - 2019
N2 - Additive manufacturing is a promising process that has the capability for process optimization and materials development of novel, multi-material and functional components of complex geometries due to the rapid and localized directional solidification of molten metallic alloys. Directed energy deposition, an additive manufacturing process that uses a high powered laser to melt blown metallic powder, introduces large gradients and sensitivity in thermal histories within a built component that lead to unique phase transformations, microstructures, residual stress and anisotropic mechanical behavior. Control of the overall mechanical behavior of DED-built components relies on control of thermal history at localized areas. Research at Northwestern University, in collaboration with Argonne National Laboratory, uses in-situ monitoring techniques such as infrared (IR) cameras, an IR two-wave pyrometer to monitor the melt pool, and a high-powered synchrotron to capture the phase change during build. Relationships between temperature, solidification rate and thermal gradient are made with the resulting microstructural characteristic and mechanical behavior at localized areas of each build. Linking thermal history to mechanical behavior of additively-built parts will lead to increased thermal control for optimal properties and open the door to alloy development.
AB - Additive manufacturing is a promising process that has the capability for process optimization and materials development of novel, multi-material and functional components of complex geometries due to the rapid and localized directional solidification of molten metallic alloys. Directed energy deposition, an additive manufacturing process that uses a high powered laser to melt blown metallic powder, introduces large gradients and sensitivity in thermal histories within a built component that lead to unique phase transformations, microstructures, residual stress and anisotropic mechanical behavior. Control of the overall mechanical behavior of DED-built components relies on control of thermal history at localized areas. Research at Northwestern University, in collaboration with Argonne National Laboratory, uses in-situ monitoring techniques such as infrared (IR) cameras, an IR two-wave pyrometer to monitor the melt pool, and a high-powered synchrotron to capture the phase change during build. Relationships between temperature, solidification rate and thermal gradient are made with the resulting microstructural characteristic and mechanical behavior at localized areas of each build. Linking thermal history to mechanical behavior of additively-built parts will lead to increased thermal control for optimal properties and open the door to alloy development.
KW - Additive manufacturing
KW - Characterization
KW - Directed energy deposition
KW - Metal
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U2 - 10.1007/978-3-319-95083-9_17
DO - 10.1007/978-3-319-95083-9_17
M3 - Conference contribution
AN - SCOPUS:85061383529
SN - 9783319950822
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 97
EP - 98
BT - Mechanics of Additive and Advanced Manufacturing, Volume 8 - Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics
A2 - Kramer, Sharlotte
A2 - Carroll, Jay
A2 - Jordan, Jennifer L.
A2 - Jin, Helena
A2 - Beese, Alison M.
PB - Springer Science and Business Media, LLC
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2018
Y2 - 4 June 2018 through 7 June 2018
ER -