Grain size control in the weld pool and heat affected zone using holograms - Higginson.pdf (1.48 MB)

Grain size control in the weld pool and heat affected zone using holograms

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journal contribution
posted on 16.09.2014, 14:54 by Rebecca Higginson, M. Blackmur, Matt Gibson, John Tyrer
This paper considers the use of Holographic Optical Elements (HOEs) to shape the weld beam and hence control the grain size of the weld bead and the grain growth and phase transformations in the HAZ. Welds have been produced on carbon steel with the introduction of a nickel based filler powder, using different energy densities produced by the HOEs. Cross sections of the welds have been analysed in terms of the weld profile, weld pool shape and grain size in the deposit and the HAZ. Electron BackScatter Diffraction (EBSD) coupled with Energy Dispersive X-ray Spectroscopy (EDS) has been used to study the microstructures developed. The results have shown that by utilising HOEs the grain size within the weld pool can be controlled such that a more equiaxed grain structure is developed when compared with the coarse columnar grains seen with a Gaussian beam.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

RECRYSTALLIZATION AND GRAIN GROWTH IV

Volume

715-716

Pages

340 - 345 (6)

Citation

HIGGINSON, R.L. ... et al, 2012. Grain size control in the weld pool and heat affected zone using holograms. Materials Science Forum, 715-716, pp. 340 - 345.

Publisher

© Trans Tech Publications

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2012

Notes

This article was published in the journal, Materials Science Forum [© Trans Tech Publications] and the definitive version is available at: http://www.scientific.net/MSF

ISSN

0255-5476

Language

en

Location

Sheffield, ENGLAND