Influence of Wobble-Based Scanning Strategy on Surface Morphology of Laser Powder Bed-Fabricated Permalloy

Ta Yu Huang, Chung Wei Cheng*, An Chen Lee, Tsung Wei Chang, Mi Ching Tsai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Surface roughness quality is still a significant problem in the laser powder bed fusion (LPBF) process. This study proposes a wobble-based scanning strategy to improve the insufficiencies of the traditional scanning strategy with regard to surface roughness. A laboratory LPBF system with a self-developed controller was used to fabricate Permalloy (Fe-79Ni-4Mo) with two scanning methods: traditional line scanning (LS) and the proposed wobble-based scanning (WBS). This study investigates the influences of these two scanning strategies on porosity and surface roughness. The results imply that WBS can maintain higher surface accuracy than LS, and the surface roughness can be reduced by about 45%. Furthermore, WBS can produce periodic surface structures arranged in fish scales or parallelograms with appropriate parameters.

Original languageEnglish
Article number2062
JournalMaterials
Volume16
Issue number5
DOIs
StatePublished - Mar 2023

Keywords

  • laser powder bed fusion
  • periodic surface structure
  • scanning strategy
  • surface roughness

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