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Deformation effect of melt pool boundaries on the mechanical property anisotropy in the SLM AlSi10Mg
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The effect of microstructure characteristic on the anisotropy of
mechanical properties has been studied for a selective laser melt (SLM)
AlSi10Mg material. The cell structure and fine grains at the melt pool
boundarie (MPB) are gradually eliminated by different heat treatment
processes. Althought the cell structure of MPB has been eliminated, it
is found that the mechanical properties of the transverse specimen and
longitudinal specimen are still different due to the heterogeneity of
grain. In the process of plastic deformation, when the tensile direction
perpendicular to the MPB, the deformation incompatibility between fine
grains and columnar grains lead to the excessive stress concentration
and rapid fracture along the zone boundary. The change of loading
direction can alleviate strain localization and improve the uniform
deformation ability of the sample. The heterostructure of SLM AlSi10Mg
is related to the remelting and resolidification of MPBs. The results
provide guidance for the design of SLM AlSi10Mg material with better
mechanical properties.
Title: Deformation effect of melt pool boundaries on the mechanical property anisotropy in the SLM AlSi10Mg
Description:
The effect of microstructure characteristic on the anisotropy of
mechanical properties has been studied for a selective laser melt (SLM)
AlSi10Mg material.
The cell structure and fine grains at the melt pool
boundarie (MPB) are gradually eliminated by different heat treatment
processes.
Althought the cell structure of MPB has been eliminated, it
is found that the mechanical properties of the transverse specimen and
longitudinal specimen are still different due to the heterogeneity of
grain.
In the process of plastic deformation, when the tensile direction
perpendicular to the MPB, the deformation incompatibility between fine
grains and columnar grains lead to the excessive stress concentration
and rapid fracture along the zone boundary.
The change of loading
direction can alleviate strain localization and improve the uniform
deformation ability of the sample.
The heterostructure of SLM AlSi10Mg
is related to the remelting and resolidification of MPBs.
The results
provide guidance for the design of SLM AlSi10Mg material with better
mechanical properties.
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