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Dispersion of CNTs in Selective Laser Melting Printed AlSi10Mg Composites via Friction Stir Processing
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The superior elastic modulus, stiffness and wear resistance of particulate-reinforced metal composites (MMCs) have drawn much attention in various industries ranging from defence, aerospace and automobile industries. Here, friction stir processing (FSP) has successfully dispersed carbon nanotubes (CNTs) and significantly reduced cavities in selective laser melting (SLM) fabricated AlSi10Mg-CNTs composites. Further grain refinement, was achieved via FSP with the addition of CNTs. This is mainly attributed to the dynamic recrystallization and Zener pinning effect. The addition of CNTs to AlSi10Mg resulted in significant improvement in hardness of SLM fabricated aluminium composites. However, FSP of these samples resulted in reductions in the Vicker’s microhardness. This could be due to the dissolution of hardening precipitates and the absences of fine dendritic network present in SLM fabricated parts.
Trans Tech Publications, Ltd.
Title: Dispersion of CNTs in Selective Laser Melting Printed AlSi10Mg Composites via Friction Stir Processing
Description:
The superior elastic modulus, stiffness and wear resistance of particulate-reinforced metal composites (MMCs) have drawn much attention in various industries ranging from defence, aerospace and automobile industries.
Here, friction stir processing (FSP) has successfully dispersed carbon nanotubes (CNTs) and significantly reduced cavities in selective laser melting (SLM) fabricated AlSi10Mg-CNTs composites.
Further grain refinement, was achieved via FSP with the addition of CNTs.
This is mainly attributed to the dynamic recrystallization and Zener pinning effect.
The addition of CNTs to AlSi10Mg resulted in significant improvement in hardness of SLM fabricated aluminium composites.
However, FSP of these samples resulted in reductions in the Vicker’s microhardness.
This could be due to the dissolution of hardening precipitates and the absences of fine dendritic network present in SLM fabricated parts.
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