On the corrosion behaviour of laser-irradiated aluminium surfaces

Bonora, P.L.; Bassoli, M.; Cerisola, G.; Anna, P. L. De; Battaglin, Giancarlo; Mea, G. Della; Mazzoldi, P.

doi:10.1016/0040-6090(81)90518-6

Cited by 9 publications

(1 citation statement)

References 13 publications

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“…If the correct parameters are employed, pulsed LSM can be used to form a chemically homogenous layer on the surface of an aluminium alloy. This significantly improves the corrosion properties of the material and could act as a precursor to additional protection systems [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

Epitaxial Grain Growth during Surface Modification of Friction Stir Welded Aerospace Alloys by a Pulsed Laser System

Ryan

Prangnell

Williams

2006

MSF

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The liquid film re-growth behaviour resulting from pulsed laser surface melting (LSM) has been investigated for typical 2xxx, and 7xxx aerospace alloys, both on parent plate and friction stir welded (FSW) joints. In Zr free alloys, as a result of the high growth rate and steep thermal gradient, the melted layer re-grew with a stable front, epitaxially, from the parent subsurface grains. This caused a thin coarse grained solidified layer to form over the parent material, thermomechanically affected zone (TMAZ) and heat affected zone (HAZ), and fine columnar grains to develop over the FSW nugget zone of the same order in width as the nugget grain size. In the case of the Zr containing alloys, a very fine columnar grain structure was found over the entire surface, independent of the subsurface grain structure. This has been shown to occur by growth selection from a band of nanoscale Al grains epitaxially nucleated on Al3Zr dispersoids, at the melt solid interface, that had not fully dissolved in the melt.

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Section: Introductionmentioning

confidence: 99%