Grain Size Control in the Weld Pool and Heat Affected Zone Using Holograms

Rebecca L. Higginson; M. Blackmur; M. Gibson; J. Tyrer

doi:10.4028/www.scientific.net/MSF.715-716.340

Paper Titles

Thermodynamic Stabilization of Grain Size in Nanocrystalline Metals
p.323

Boundary Migration during Recrystallization of Heavily Deformed Pure Nickel
p.329

Self-Limited to Parabolic Grain Growth Kinetics in Metal Oxide Thin Films
p.333

Influence of Annealing Process on Recrystallisation Behaviour of a Heavily Cold Rolled AISI 304L Stainless Steel on Ultrafine Grain Formation
p.334

Grain Size Control in the Weld Pool and Heat Affected Zone Using Holograms
p.340

Recrystallization in Ultra-Fine Grain Structures of AA3104 Alloy Processed by ECAP and HPT
p.346

Direct Observations of Cube Nucleation from Intergranular Cube Segments in Cold Rolled Al-Mn
p.354

Warm Forming of FCC Poly Crystals: The Effect of Grain Size under Different Forming Conditions on the Softening Behavior
p.360

Recrystallized Grain Size in Single Phase Materials
p.361

HomeMaterials Science ForumMaterials Science Forum Vols. 715-716Grain Size Control in the Weld Pool and Heat...

Grain Size Control in the Weld Pool and Heat Affected Zone Using Holograms

Abstract:

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.

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Materials Science Forum (Volumes 715-716)

Pages:

340-345

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.715-716.340

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Online since:

April 2012

Authors:

Rebecca L. Higginson, M. Blackmur, M. Gibson, J. Tyrer

Keywords:

Electron Back Scatter Diffraction, Grain Size Control, Heat Affected Zone (HAZ), Holograms, Laser Welding

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