30 March 2006 Development of a smart substrate for a laser powder deposition process
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This paper presents results of ongoing research that addresses possible geometric inaccuracies and structural deficiencies arising from nonuniform heating and cooling of parts fabricated or repaired using laser powder deposition. A "smart-structures" based method is investigated, in which piezoelectric (and/or mechanical) actuators provided on the substrate are used sequentially to deform and undeform a substrate through deposition with the goal of minimizing the residual deformations/stresses in the part. Different actuation configurations are considered, and results based on linear theory are discussed. Initial experimental work is also described. Results to date indicate that the approach could be used to advantage in certain types of builds for active control/reduction of residual deformations/stresses in laser deposited parts.
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Umesh A. Korde, Umesh A. Korde, Michael A. Langerman, Michael A. Langerman, Matthew E. Hainy, Matthew E. Hainy, Travis J. Zelfer, Travis J. Zelfer, James W. Sears, James W. Sears, "Development of a smart substrate for a laser powder deposition process", Proc. SPIE 6171, Smart Structures and Materials 2006: Industrial and Commercial Applications of Smart Structures Technologies, 617103 (30 March 2006); doi: 10.1117/12.657476; https://doi.org/10.1117/12.657476

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