Comparing Microstructure And Hardness Of Direct Metal Laser Sintered AlSi10Mg Alloy Between Different Planes

Abstract

Microstructural analysis and micro-hardness measurements were performed on different planes of AlSi10Mg alloy fabricated by direct metal laser sintering (DMLS) technique. A fine cellular dendritic network was observed within the alloy microstructure, where morphology of most cells changed from columnar on XZ-plane (vertical section) to equiaxed on XY-plane (horizontal section). Correspondingly, morphology of most grains was found to alter from columnar for the XZ-plane to equiaxed in the case of the XY-plane. Thus, the morphology of the solidification cells was determined to be strongly dependent on the morphology of the grains containing them. Moreover, X-ray diffraction (XRD) analysis revealed a similar phase assemblage for both the planes. The average micro-hardness value for the XZ-plane and XY-plane was insignificantly (≈ 3%) different, which was attributed to the random grain orientation observed on both the planes.

Department(s)

Mechanical and Aerospace Engineering

Comments

Air Force Research Laboratory, Grant FA8650-12-2-7230

Keywords and Phrases

Additive manufacturing; Aluminum; DMLS; Hardness; Microstructure

International Standard Serial Number (ISSN)

1526-6125

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

01 Jan 2019

Link to Full Text

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