Effect of Hard Coatings on Surface Gray Iron on Fracture Toughness

L.D. Rosado Cruz; Marco Antonio Doñu-Ruíz; N. López Perrusquia; V.J. Cortés Suárez; C.R. Torres San Miguel; T. de la Mora Ramírez

doi:10.4028/www.scientific.net/DDF.353.248

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Effect of Hard Coatings on Surface Gray Iron on Fracture Toughness

Abstract:

The characterization and fracture toughness with hard coatings formed at the surface of gray cast irons class 30 is evaluated in the present study. The formation of hard coatings was obtained out means of the pack boriding process; the treatment was carried out at temperatures of 1173 and 1223 K during 6 hours. The layers were evaluated by the techniques of X-ray diffraction (XRD), energy dispersive spectrometry (EDS) and microindentation across the thickness of the iron boride layer. Three-point bending tests are carried out to examine the fracture toughness of gray cast irons boriding according to the ASTM 399 standard. Consequently, the stress intensity factor was evaluated by means of the finite element method (FEM) using the package ANSYS 11. 0 creating a two-dimensional model with elements of singularity around the tip crack. The results were compared with the experiments and have been found to be in good correlation.

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Periodical:

Defect and Diffusion Forum (Volume 353)

Pages:

248-253

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.353.248

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Online since:

May 2014

Authors:

L.D. Rosado Cruz*, Marco Antonio Doñu-Ruíz, N. López Perrusquia, V.J. Cortés Suárez, C.R. Torres San Miguel, T. de la Mora Ramírez

Keywords:

Finite Element Method (FEM), Fracture Toughness, Gray Cast Irons, Hard Coatings, Three-Point Bending

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