Simultaneously enhancing strength and ductility of selective laser melted AlSi10Mg via introducing in-cell Al4C3 nanorods

Jie Wan, Kangan Li, Huarui Geng, Biao Chen, Jianghua Shen, Yazhou Guo, Katsuyoshi Kondoh, Abdollah Bahador, Jinshan Li

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Selective laser melted (SLMed) AlSi10Mg alloys usually fail before necking during tensile tests, which results in inadequate ductility. To overcome this problem, here we introduced Al4C3 nanorods into the primary Al cells of SLMed AlSi10Mg via in-situ chemical reaction. Tensile tests revealed that those in-cell Al4C3 nanorods not only increased the strain-hardening ability of SLMed AlSi10Mg but also delayed the fracture beyond necking. Consequently, 15% of tensile strength increase and 78% of ductility increase were achieved simultaneously. Post-tensile TEM analysis revealed that those in-cell Al4C3 nanorods pinned and accumulated dislocations within cells and thus alleviated stress concentration along cell boundaries.

Original languageEnglish
Pages (from-to)422-429
Number of pages8
JournalMaterials Research Letters
Volume11
Issue number6
DOIs
StatePublished - 2023

Keywords

  • AlSi10Mg
  • In-cell AlC nanorods
  • Mechanical properties
  • Selective laser melting

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