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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/16809

Title: The use of holographic optical elements (HOE's) to investigate the use of a flat irradiance profile in the control of heat absorption in wire-fed laser cladding
Authors: Goffin, Nicholas J.
Higginson, Rebecca L.
Tyrer, John R.
Keywords: Absorption
Cladding
Laser
Reflectivity
Steel
Wire
Issue Date: 2015
Publisher: © Elsevier B.V.
Citation: GOFFIN, N.J., HIGGINSON, R.L. and TYRER, J.R., 2015. The use of holographic optical elements (HOE's) to investigate the use of a flat irradiance profile in the control of heat absorption in wire-fed laser cladding. Journal of Materials Processing Technology, 220, pp. 191 - 201.
Abstract: This work investigates the use of holographic optical elements (HOE's) to control the applied heat profile and thermal absorption of a wire used for laser cladding. The two thermal distributions compared were a circular beam with a Gaussian heat profile (Gaussian beam) and a square beam with a flat profile (pedestal beam). Heat absorption calculations between these were carried out to show the potential differences in absorption, with empirical results created to show how the differences in absorption affect the cladding properties. Micrographs of the clad cross-sections were created using optical microscopy and were analysed with respect to wetting angle and clad dilution. These results were compared to an alternative method of applying an even beam profile; enlarging the Gaussian beam relative to the wire diameter. The results showed that the use of a HOE to create a more even beam profile gave superior wetting behaviour and less dilution.
Description: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Materials Processing Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Materials Processing Technology, VOL 220, 2015. DOI: 10.1016/j.jmatprotec.2015.01.023
Version: Accepted for publication.
DOI: 10.1016/j.jmatprotec.2015.01.023
URI: https://dspace.lboro.ac.uk/2134/16809
Publisher Link: http://dx.doi.org/10.1016/j.jmatprotec.2015.01.023
ISSN: 0924-0136
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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