Journal article Compositionally graded titanium to aluminum processed by laser powder bed fusion process: Microstructure evolution and mechanical properties
Phuangphaga Daram (author) (Search by this author)
ORCID https://orcid.org/0000-0001-8937-6319
National Institute for Materials Science
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Alok Singh (author) (Search by this author)
ORCID https://orcid.org/0000-0001-5515-8305
National Institute for Materials Science
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Takanobu Hiroto (author) (Search by this author)
ORCID https://orcid.org/0000-0002-6176-5782
National Institute for Materials Science
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Tomonori Kitashima (author) (Search by this author)
ORCID https://orcid.org/0000-0003-0828-7483
National Institute for Materials Science
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Makoto Watanabe (author) (Search by this author)
ORCID https://orcid.org/0000-0002-5064-9583
National Institute for Materials Science
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P.Daram, et.al-2024_Compositionally graded titanium to aluminum processed by laser powder bed fusion process- Microstructure evolution and mechanical properties.docx
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Phuangphaga Daram, Alok Singh, Takanobu Hiroto, Tomonori Kitashima, Makoto Watanabe. Compositionally graded titanium to aluminum processed by laser powder bed fusion process: Microstructure evolution and mechanical properties. Materials Science and Engineering: A. 2024, 903 (), 146638. https://doi.org/10.1016/j.msea.2024.146638
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(abstract)

A compositionally graded Ti-Al alloy with a designed composition range from pure Ti to pure Al was successfully produced by a laser powder bed fusion (L-PBF) system equipped with two powder feeders. The compositionally graded Ti-Al profile is confirmed by scanning electron microscopy, X-ray diffraction analysis, electron backscatter diffraction microscopy, and transmission microscopy. The graded material is free of macro-horizontal cracks, but micro-cracks appear at the center of the sample. Varying the Ti and Al ratio along the build direction induces microstructural changes, transforming alpha+beta-Ti into solid solution, creating intermetallics (Ti and Al), and yielding an Al phase with diverse morphologies. Additionally, the Ti-Al ratio’s influence on microstructure formation and phase evolution results in varying mechanical properties among the graded material’s layers. The results demonstrate that the L-PBF process can achieve continuous compositional grading of Ti-Al materials in a single run. Moreover, this study hold the potential to facilitate the design and production of numerous compositional variants for high entropy alloys and multi-materials, enabling future investigation into microstructural evolution, phase transformation, and physical and mechanical properties.

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Keyword: Laser powder bed fusion process, Compositionally graded materials, Ti–Al alloy, Microstructure, Mechanical properties

Date published: 2024-05-15

Publisher: Elsevier BV

Journal:

  • Materials Science and Engineering: A (ISSN: 09215093) vol. 903 146638

Funding:

  • Japan Society for the Promotion of Science JP21K03814

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4553

First published URL: https://doi.org/10.1016/j.msea.2024.146638

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Updated at: 2024-06-24 10:01:25 +0900

Published on MDR: 2026-05-16 08:25:03 +0900

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