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Title: Indentation Parameter Combinations on the Failure in a Coated System
Authors: Pérez Ruiz, Eduardo Alberto
Llano Martínez, Jorge Fredy
Negrín Hernández, Luis Iván
Keywords: Circular cracks
Coated system
Indentation parameters
Issue Date: 3-Sep-2019
Publisher: International Journal of Engineering Research and Technology
Citation: Peréz Ruiz, E. A., Llano Martinez, J. F., & Negrín Hernández, L. I. (2019). Indentation Parameter Combinations on the Failure in a Coated System. International Journal of Engineering Research and Technology, 12(9), 1523.
Abstract: The deposition of wear resistant thin films represents an usual procedure to improve the tribological behavior of mechanical components and parts. Depending on the application, the fracture toughness of the film plays a key role and different methods were developed to evaluate this mechanical property. Recently, the film fracture toughness was related to the distance between circular cracks generated during the spherical indentation of coated systems with soft substrates. In this work, analyses were conducted to further understand the phenomenon of circular crack formation during indentation, including the effect of load and indenter diameter. Films of chromium nitride (CrN) were deposited onto AA 6061 aluminum substrates through a commercial physical vapor deposition (PVD) process. Coated specimens were later indented by spheres with diameters from 1.59 to 6.35 mm, which applied normal loads from approximately 196.1 to 490.3 N. Similar amounts of circular cracks were obtained when an increase in indenter diameter was associated with an increase in normal load.
ISSN: 0974-3154
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