Microstructural Characterization and Wear Resistance of 60 wt.%, 70 wt.%, and 80 wt.% WC-NiCrBSi Thin Walls Deposited Using Plasma Transferred Arc Additive Manufacturing

Plasma transferred arc additive manufacturing (PTA-AM) was used to deposit 60 wt.%, 70 wt.%, and 80 wt.% WC-NiCrBSi metal matrix composites. The 60 wt.% samples had a homogeneous distribution of WC particles. At 70 wt.% and 80 wt.%, two defects were found in the microstructure: areas completely void...

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Bibliographic Details
Published in:JOM (1989) 2024, Vol.76 (1), p.42-56
Main Authors: Rose, Dylan, Wolfe, Tonya, Henein, Hani
Format: Article
Language:English
Subjects:
Abrasive wear
Additive manufacturing
Additive Manufacturing Using Composite Powders
Arc deposition
Cameras
Chemistry/Food Science
Earth Sciences
Electrodes
Energy industry
Engineering
Environment
Impact resistance
Manufacturing
Metal matrix composites
Microscopy
Microstructure
Physics
Plasma
Plasma transferred arc process
Solidification
Solids
Thermal degradation
Thin walls
Titanium alloys
Tungsten carbide
Wear resistance
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Summary:Plasma transferred arc additive manufacturing (PTA-AM) was used to deposit 60 wt.%, 70 wt.%, and 80 wt.% WC-NiCrBSi metal matrix composites. The 60 wt.% samples had a homogeneous distribution of WC particles. At 70 wt.% and 80 wt.%, two defects were found in the microstructure: areas completely void of WC, termed denuded regions, and large pores. The microstructure of the 60 wt.% sample consisted of blocky complex carbides [(Ni 4 W 2 Cr 2 Si)C 3 ], γ -Ni cellular dendrites, a halo around the primary dendrites, and a lamellar eutectic of Ni 3 Si/Ni 3 B. There is increased thermal degradation of WC at 70 wt.% WC, causing a wider array of complex carbides and higher W contents in the γ -Ni dendrites and the halo. Thermo-calc software was used to model the solidification of NiCrBSi with 10 wt.% W to determine the effect that W addition has on the solidification of the Ni alloy, and the results were compared to the 60 wt.% and 70 wt.% WC-NiCrBSi PTA-AM deposits. The abrasive wear resistance and the impact resistance of 60 wt.%, 70 wt.%, and 80 wt.% WC deposited with PTA-AM were comparable to a 60 wt.% WC-NiCrBSi PTA overlay.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-023-06074-0