Fabrication of magnesium using selective laser melting technique

Chi Chung Ng, Monica Savalani, Hau Chung Man

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)

Abstract

Purpose - Magnesium has been considered as a new generation of bioactive and biodegradable implant for orthopaedic applications because of its prominent properties including superior biocompatibility, biodegradability and proper mechanical stiffness. For the direct production of custom biomedical implants, selective laser melting (SLM) has been investigated to fabricate pure magnesium and its resultant properties. The primary objective of this paper is to identify the most appropriate mode of irradiation for the melting of pure magnesium powders due to its reactive properties. This study focuses on investigating the interaction between the laser source and the magnesium powders by varying the SLM parameters of the laser power and scan speed under continuous or pulse mode conditions. Design/methodology/approach - Single magnesium tracks were fabricated under different processing conditions using SLM, in order to evaluate the effects of processing parameters on the dimension and surface morphology of the achieved parts. The digital images of the tracks were used to analyze the geometrical features in terms of melting width and depth. In addition, scanning electron images were also studied to understanding the selective melting mechanism. Findings - Magnesium tracks were successfully fabricated using SLM. Results showed that the dimension, surface morphology and the oxygen pick-up of the laser-melted tracks are strongly dependent on the mode of irradiation and processing parameters. Originality/value - This work is a first step towards magnesium fabrication using SLM technique. The experimental results represent an important step in understanding the magnesium under an Nd:YAG laser irradiation, which provides the basis of behavior for follow-on research and experiments.
Original languageEnglish
Pages (from-to)479-490
Number of pages12
JournalRapid Prototyping Journal
Volume17
Issue number6
DOIs
Publication statusPublished - 7 Nov 2011

Keywords

  • Bioactive implants
  • Biodegradable
  • Lasers
  • Magnesium
  • Metals
  • Rapid manufacturing
  • Selective laser melting

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

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