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The study aims to determine how varying hatch distances affect corrosion resistance and mechanical properties of Mg alloy WE43 while preserving biocompatibility.

April 29, 2026ACS Applied Bio Materials0 citationsOpen Access

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Laser Hatch Distance Can Tune Corrosion Behavior and Mechanical Properties While Maintaining the In Vitro Biocompatibility of Additively Manufactured Mg Alloy WE43

HÅHanna Nilsson Åhman NBNiccoló De Berardinis LLLisa Larsson

Key Points

The study aims to determine how varying hatch distances affect corrosion resistance and mechanical properties of Mg alloy WE43 while preserving biocompatibility.
Utilized powder bed fusion laser beam (PBF-LB) to process Mg alloy WE43 with hatch distances of 40, 50, and 60 μm.
Analyzed samples for microstructure, corrosion resistance, and mechanical properties at different hatch distances.
h60 exhibited weaker texture and narrower grain size distribution, with fewer grains under 200 μm, impacting mechanical strength and corrosion behavior.

Abstract

Powder bed fusion laser beam (PBF-LB) of Mg alloys shows strong potential for biodegradable, patient-specific implants. A key challenge is achieving adequate corrosion resistance and mechanical strength while maintaining biocompatibility. This study investigates whether varying hatch distance can balance these properties in PBF-LB processed WE43 (Mg-4Y-3RE-Zr; RE: rare earth elements). Optimal laser parameters were developed for hatch distances of 40, 50, and 60 μm (h40, h50, and h60), and samples were analyzed for microstructure, corrosion resistance, and mechanical properties. Results showed that h60 had a weaker texture and narrower grain size distribution, with fewer grains under 200 μm

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Cite This Study

Åhman et al. (Mon,) studied this question.

synapsesocial.com/papers/69f19f9cedf4b468248066dc https://doi.org/https://doi.org/10.1021/acsabm.5c02351

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