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Comparison between process simulation and deformation measured by defocused speckle photography
Author(s): Joel Wahl; Per Gren; Per Bergström; Torbjörn Lindbäck; Malin Magnusson; Kristina Domeij; Mikael Sjödahl
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Paper Abstract

Defocused laser speckle photography is used as a tool to measure the heat responses in a titanium component during laser heating. The evolution of the response is compared with a set of preprocessed Finite Element Simulations of the corresponding process with the aim to verify the simulation model and to find the simulation settings that best resemble the experimental results. The titanium component consists of a 300 x 100 mm2 substrate of thickness 3.2 mm on which a 200 x 30 x 11 mm3 ridge is built up using the laser metal deposition by wire process. The component is heated on the top of the ridge by a 300 W laser for 10 s and the deformation of the subtrate is followed throughout the heating-cooling cycle. The simulated deformation gradient is shown to resemble the measured response, and the magnitude of the response indicates that about 70 % of the laser power transferres into heat in the metal.

Paper Details

Date Published: 7 September 2018
PDF: 8 pages
Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 108341K (7 September 2018); doi: 10.1117/12.2319384
Show Author Affiliations
Joel Wahl, Lulea Univ. of Technology (Sweden)
Per Gren, Lulea Univ. of Technology (Sweden)
Per Bergström, Lulea Univ. of Technology (Sweden)
Torbjörn Lindbäck, Lulea Univ. of Technology (Sweden)
Malin Magnusson, GKN Aerospace Sweden AB (Sweden)
Kristina Domeij, GKN Aerospace Sweden AB (Sweden)
Mikael Sjödahl, Lulea Univ. of Technology (Sweden)


Published in SPIE Proceedings Vol. 10834:
Speckle 2018: VII International Conference on Speckle Metrology
Malgorzata Kujawińska; Leszek R. Jaroszewicz, Editor(s)

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