Mechanical Properties of Internally Hierarchical Multiphase Lattices Inspired by Precipitation Strengthening Mechanisms

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

16 Scopus Citations
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Author(s)

  • Yijie Bian
  • Ruicheng Wang
  • Fan Yang
  • Puhao Li
  • Yicheng Song
  • Jiemin Feng
  • Wenwang Wu

Detail(s)

Original languageEnglish
Pages (from-to)15928–15937
Journal / PublicationACS Applied Materials and Interfaces
Volume15
Issue number12
Online published16 Feb 2023
Publication statusPublished - 29 Mar 2023

Abstract

In metal metallurgy, precipitation strengthening is widely used to increase material strength by utilizing the impediment effect of the second-phase particles on dislocation movements. Inspired by this mechanism, in this paper, novel multiphase heterogeneous lattice materials are developed with enhanced mechanical properties utilizing a similar hindering effect of second-phase lattice cells on the shear band propagation. For this purpose, biphase and triphase lattice samples are fabricated using high-speed multi jet fusion (MJF) and digital light processing (DLP) additive manufacturing techniques, and a parametric study is carried out to investigate their mechanical properties. Different from the conventional random distribution, the second-phase and third-phase cells in this work are continuously distributed along the regular pattern of a larger-scale lattice to form internal hierarchical lattice structures. The results show that the triphase lattices possess balanced mechanical properties. Interestingly, this indicates that introducing a relatively weak phase also has the potential to improve the stiffness and plateau stress, which is distinct from the common mixed rule. This work is aimed at providing new references for the heterogeneous lattice design with outstanding mechanical properties through material microstructure inspiration. © 2023 American Chemical Society.

Research Area(s)

  • bi-phase lattice, hierarchical structure, lattice material, second phase strengthening, tri-phase lattice

Citation Format(s)

Mechanical Properties of Internally Hierarchical Multiphase Lattices Inspired by Precipitation Strengthening Mechanisms. / Bian, Yijie; Wang, Ruicheng; Yang, Fan et al.
In: ACS Applied Materials and Interfaces, Vol. 15, No. 12, 29.03.2023, p. 15928–15937.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review