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Multipass friction stir processing of laser-powder bed fusion AlSi10Mg: microstructure and mechanical properties

Heidarzadeh Akbar, Khorshidi Mahsa, Mohammadzadeh Roghayeh, Khajeh Rasoul, Mofarrehi Mohammadreza, Javidani Mousa et Chen X-Grant. (2023). Multipass friction stir processing of laser-powder bed fusion AlSi10Mg: microstructure and mechanical properties. Materials, 16, e1559.

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The effect of multipass friction stir processing (FSP) on the microstructure and mechanical properties of an AlSi10Mg alloy produced by laser-powder bed fusion was investigated. FSP was performed at a rotational speed of 950 rpm and traverse speed of 85 mm/min. The results indicated that FSP destroyed the coarse grain structure in the as-built AlSi10Mg by generating fine and equiaxed grain structures with shear texture components of A∗ 1 (111) 112 and A∗2 (111) 112, in addition to causing fragmentation and refinement of the Si networks. FSP reduced the tensile strength slightly but significantly improved ductility. One-pass FSP exhibited superior mechanical properties compared with the two- and three-pass scenarios. The higher strength of the one-pass sample was attributed to the strengthening mechanisms induced by the Si particles, which were grown by repeated FSP. The higher ductility of the one-pass sample was explained using the kernel and grain average misorientations. Furthermore, the post-FSP microstructural evolution and fracture behavior of the samples were discussed.

Type de document:Article publié dans une revue avec comité d'évaluation
Version évaluée par les pairs:Oui
Identifiant unique:10.3390/ma16041559
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:AlSi10Mg alloy, laser-powder bed fusion, friction stir processing, microstructure, mechanical properties
Déposé le:13 juill. 2023 18:35
Dernière modification:13 juill. 2023 18:35
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