Fabricating pyramidal lattice structures of 304 L stainless steel by wire arc additive manufacturing

Haorui Zhang, Junjin Huang, Changmeng Liu, Yongsheng Ma, Yafeng Han, Tianqiu Xu, Jiping Lu, Hongli Fang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Lattice structures have drawn considerable attention due to their superior mechanical properties. However, the existing fabrication methods for lattice structures require complex procedures, as they have low material utilization and lead to unreliable node connections, which greatly restricts their application. In this work, wire arc additive manufacturing is used to fabricate large-scale lattice structures efficiently, without any air holes between rods and panels. The principle and the process of fabricating the rods were analyzed systematically. The influence of the two most important parameters, including heat input and preset layer height, is disclosed. Through optical microscopy, the microstructure of the fabricated steel rods is found to consist of dendritic austenite and skeletal ferrite. The tensile strength of the rods can reach 603 MPa, and their elongation reaches 77%. These experimental results demonstrated the feasibility of fabricating lattice structures using wire arc additive manufacturing.

Original languageEnglish
Article number3482
JournalMaterials
Volume13
Issue number16
DOIs
Publication statusPublished - Aug 2020

Keywords

  • 304 L stainless steel
  • Lattice structures
  • Manufacturing
  • Microstructure
  • Wire arc additive

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