4.6 Article

Comparison between friction stir processing and laser remelting processes of cold sprayed metallic composite coatings

Journal

MATERIALS LETTERS
Volume 349, Issue -, Pages -

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ELSEVIER
DOI: 10.1016/j.matlet.2023.134898

Keywords

Coatings; Composite; Cold spray; Laser melting; Friction stir processing

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Friction stir processing (FSP) and laser remelting were compared as post-treatment procedures for an Al-Cu-Ni cold spray metal composite. Both methods produced an alloy coating with new intermetallic phases AlNi and Al2Cu that were not present in the as-sprayed material. The integrity of the FSP-treated coating was significantly higher than the laser-treated one due to the absence of material melting. FSP is an efficient post-treatment process for improving the uniformity and phase composition of cold sprayed composite coatings.
Friction stir processing (FSP) is applied for the post-treatment of an Al-Cu-Ni cold spray metal composite in order to produce an alloy coating. The results are compared with laser remelting of the same material. It was shown that both post-treatment procedures form an alloy containing new intermetallic phases AlNi and Al2Cu initially absent in the as-sprayed material. The integrity of the coating treated by FSP was significantly higher than the laser-treated one due to the absence of material melting, which can introduce significant porosity. Thus, FSP could be considered an efficient post-treatment process of cold sprayed composite coatings leading to the improvement of the coating uniformity and modification of the phase composition.

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