RMIT University - Advanced Manufacturing Precinct (B55-ICR) or via MS Teams

HS-L-DED of Stellite 6 Coatings on Steel Substrates


Come and celebrate ARC SEAM HDR Ricky (Zefeng) Wu’s completion of his PhD candidacy.


High-speed laser directed energy deposition (HS-L-DED) process is gaining traction in coating applications and repair, driven by its high production efficiency and minimal disruption to substrate materials. 300M steel is a low-alloy ultra-high-strength steel, commonly used for manufacturing of aircraft landing gears. The component surface requires wear resisting coating which has been traditionally applied by electrolytic hard-chrome (EHC) plating. However, the increasing environmental concerns of electroplating processes are stimulating a search for alternative coating and application processes, such as the HS-L-DED process, to reduce its environmental impact. Stellite® 6, a commercially developed hard-facing cobalt alloy, exhibits a potential compatibility to HS-L-DED process, but a further study is required to explore the key contributors to its deposit formation and microstructural evolution when deposition speed exceeds 10 m/min. This thesis contributes to the evolving field of HS-L-DED, offering insights into deposit formation, process optimization, and the potential for superior Stellite® 6 coatings with enhanced wear resistance and bond strength to steel substrates. The research findings deepen the understanding of microstructural evolution of Stellite® 6 alloy during rapid solidification. Further research is recommended to enhance the understanding of high-speed melt pool formation and its implications on deposit quality.

About the speaker

In 2013 Ricky graduated with a Bachelor of Engineering (Metallurgical Engineering)from the Western Australian School of Mines at Curtin University . Following this he spent time as the Secretary then Technical Event Coordinator for the Australasian Institute of Mining and Metallurgy while working as a Lab Technician for Kalgoorlie Consolidated Gold Mines .

A move to Victoria to work with Wilmar Sugar Australia Pty Ltd preceded Ricky’s completion of a Master of Engineering at RMIT where he went on to be one of ARC SEAM’s first recruits on a HDR Scholarship. Undertaking placement with Rosebank Engineering/Ruag throughout the pandemic years, Ricky has shown tremendous resilience and determination along with excellence in research to now be graduating from RMIT’s PhD program.


Ricky (Zefeng) Wu


15 May 2024


11:00 am - 1:00 pm (GMT+10)
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RMIT University - Advanced Manufacturing Precinct (B55-ICR) or via MS Teams

Room B55-ICR, RMIT Building 55

58 Cardigan Street, Carlton, VIC 3001

Online via MS Teams.

Please Register for tickets and/or for link to online event.

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