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Nanostructured Materials Lab

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fabrication of Fe-based bulk metallic glass by selective laser melting…

Abstract
Soft magnetic Fe-based bulk metallic glass cylindrical specimens with a diameter of 2 mm and height of 6 mm
have been successfully fabricated by selective laser melting (SLM) and the effect of scan speed v and laser
power P on themicrostructure, thermal stability and softmagnetic properties has been investigated. The results
indicate that lowv and high P lead to the formation of SLMsampleswith high relative densities,which can reach
values of about 99.7%. This can be ascribed to the optimal energy transfer during processing at low v and high P.
Structural and calorimetric studies prove that the SLM samples are fully amorphous. In addition,magneticmeasurements
reveal that the amorphous structure of the SLMmaterial is identical to the parent atomized powders.
Although additionalwork is required to remove the residual porosity and to avoid the formation of cracks during
processing, the present results confirm that additive manufacturing by SLMrepresents an alternative processing
route for the preparation of bulk metallic glass components with designed geometry having excellent magnetic
softness.