Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 959, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2023.170496
Keywords
TiC-based cermets; Selective laser melting; Wear; Tribo-layer; Coefficient of friction
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This study investigates the tribological behavior of TiC-430 L SS cermets fabricated by laser powder bed fusion/selective laser melting. The wear mechanism of the binder and matrix phase was studied using Rockwell indenter and scratch tests. It was found that the scratch hardness increases with increasing load, but decreases with increasing number of passes.
This study deals with the tribological behavior of the TiC-430 L SS cermets fabricated via an additive manufacturing process such as laser powder bed fusion/selective laser melting. A gradient microstructure (finer and coarser morphology) can be observed in the fabricated parts due to SLM's complex thermal history. Using Rockwell indenter, single and multiple passes scratch tests have been performed as a function of applied load to study the wear mechanism of the binder and matrix phase. A surface 3D profilometer was used to analyze the scratch track variation in terms of scratch width and depth. Scanning Electron mi-croscopy (SEM) analysis was performed on the scratched cermet parts to study the wear mechanism and microstructural analysis. It has been observed that the scratch hardness increases with increasing load and the same decreases with increasing the number of passes. Similarly, the coefficient of friction increases with increasing load. Cermets with complex microstructural features exhibit high wear resistance under low loads and for higher loads, multiple passes can lead to tribolayer formation.(c) 2023 Elsevier B.V. All rights reserved.
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