Thermoplastic forming of additively manufactured Zr-based bulk metallic glass: A processing route for surface finishing of complex structures

Additive manufacturing of bulk metallic glasses (BMGs) through laser powder bed fusion (LPBF) has drawn growing interest in the last years, especially concerning industry-relevant alloys based on iron or zirconium. The process-inherent high cooling rates and localized melting pools allow to overcome...

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Bibliographic Details
Main Authors: Maximilian Frey, Jan Wegner, Nico Neuber, Benedikt Reiplinger, Benedikt Bochtler, Bastian Adam, Lucas Ruschel, Sascha Sebastian Riegler, Hao-Ran Jiang, Stefan Kleszczynski, Gerd Witt, Ralf Busch
Format: Article
Language:English
Published: Elsevier 2021-01-01
Series:Materials & Design
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Online Access:http://www.sciencedirect.com/science/article/pii/S0264127520309047
Description
Summary:Additive manufacturing of bulk metallic glasses (BMGs) through laser powder bed fusion (LPBF) has drawn growing interest in the last years, especially concerning industry-relevant alloys based on iron or zirconium. The process-inherent high cooling rates and localized melting pools allow to overcome geometrical restrictions given for the production of BMGs by classical casting routes. Yet, the achievable surface qualities are still limited, making an adequate post-processing necessary. In this work, we report on applying thermoplastic forming on LPBF-formed parts for the first time to decrease surface roughness and imprint finely structured surface patterns without the need for complex abrasive machining. This BMG-specific post-processing approach allows to functionalize surface areas on highly complex LPBF-formed specimens, which could be of interest especially for medical or jewelry applications.
ISSN:0264-1275