Interfacial indentation test of FeB/Fe2B coatings

Campos-Silva, I.; Martínez-Trinidad, J.; Doñu-Ruíz, Marco Antonio; Rodríguez-Castro, G.A.; Hernández-Sánchez, Enrique; Bravo-Bárcenas, O.

doi:10.1016/j.surfcoat.2011.08.017

Cited by 38 publications

(10 citation statements)

References 23 publications

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“…The calculated hardness of FeB (26.25 GPa) and Fe 2 B (18.34 GPa) are in fairly good agreement with the experimental values of (20.4 ± 0.017 GPa) for Fe 2 B and (16.2 ± 0.011 GPa) for FeB [43]. The disagreement can be explained by the fact that experimentally measured values of hardness of materials are very sensitive to many parameters including loading and unloading speed, applied load, anisotropy of materials, defects in the sample, method of measurement, temperature, etc.…”

Section: Speciessupporting

confidence: 82%

Effect of spin polarization on the structural properties and bond hardness of Fe x B (x = 1, 2, 3) compounds first-principles study

et al. 2016

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In this paper, spin and non-spin polarization (SP, NSP) are performed to study structural properties and bond hardness of Fe x B (x = 1, 2, 3) compounds using density functional theory (DFT) within generalized gradient approximation (GGA) to evaluate the effect of spin polarization on these properties. The non-spin-polarization results show that the non-magnetic state (NM) is less stable thermodynamically for Fe x B compounds than spinpolarization by the calculated cohesive energy and formation enthalpy. Spin-polarization calculations show that ferromagnetic state (FM) is stable for Fe x B structures and carry magnetic moment of 1.12, 1.83 and 2.03 μB in FeB, Fe 2 B and Fe 3 B, respectively. The calculated lattice parameters, bulk modulus and magnetic moments agree well with experimental and other theoretical results. Significant differences in volume and in bulk modulus were found between the ferromagnetic and non-magnetic cases, i.e., 6.8, 32.8%, respectively. We predict the critical pressure between ferromagnetic and non-magnetic phases. The model for hardness calculation using Mulliken population coupled to semi-empirical hardness theory proved effective in hardness prediction for the metal borides which agree well with the experimental values. These results would help to gain insight into the spin-polarized effect on the structural and bond hardness.

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Section: Speciessupporting

confidence: 82%

Effect of spin polarization on the structural properties and bond hardness of Fe x B (x = 1, 2, 3) compounds first-principles study

et al. 2016

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“…The results can be explained by considering the following: during cooling, the shrinkage of the substrate prevails in the system, which submits the Fe 2 B phase (7.85 × 10 -6 °C -1 ) to compressive stresses since the coefficient of thermal expansion of the substrate is greater (18 × 10 -6 °C -1 ). The same applies between the FeB and Fe 2 B phase, where the thermal expansion coefficient of the former is 23 × 10 -6 °C -1 , resulting in a selft-equilibrating stress state 23 . In fact, the residual stresses in coating are mainly caused by lattice spacing and thermal expansion mismatch between the coating and substrate 13 .…”

Section: Berkovich Depth-sensing Indentationmentioning

confidence: 99%

Damage Mechanisms in AISI 304 Borided Steel: Scratch and Daimler-Benz Adhesion Tests

et al. 2015

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In this study, damage mechanisms in the FeB/Fe 2 B coatings formed on the surface of AISI 304 steel are determined by adhesion tests. First, the boriding of the AISI 304 steel was carried out through the powder-pack method at 1223 K in the range from 2-10 h of exposure time. After treatment, Berkovich depth-sensing indentation test were conducted; the result showed tensil and compressive residual stresses in the FeB and Fe 2 B, respectively. The adhesion of borided steels was evaluated by the Daimler-Benz Rockwell-C and scratch test. Based on the scratch tracks, the chipping was the predominant mechanism at 2 and 6 h, with critical loads of 35 and 43 N, respectively; while spalliation was determined at 27 N for 10 h. Also, hertzian and tensil cracks, buckling and compressive delamination were determined in the AISI 304 borided steel by scanning electron microscope.

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“…Moreover, to reduce the stress on CoB-Co2B bilayer, Delgado-Brito, et al [13] performed a diffusion annealing process (DAP) to estimate the indentation properties of a Co2B layer using the sensed microindentation fracture toughness Vickers test, obtaining new Kc results for the single-phase layer. On the other hand, Campos-Silva, et al [14] performed interfacial microindentation tests using a Vickers-type indenter to estimate the adhesion of the coating of the FeB-Fe2B bilayer generated on the surface of the borided AISI 316L alloy. The load applied, Young's modulus, hardness, and lateral longitude of the cracks generated, alongside the thickness of the FeB layer, were used to estimate the tenacity to apparent fracture and interphase adhesion of the FeB-Fe2B bi-phase layer.…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization of the AISI 316L alloy exposed to boriding process

León

Martínez-Trinidad

Campos-Silva

et al. 2020

DYNA

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In this study, the powder-pack boriding process on low-carbon stainless steel was carried out at 1273 K for 4 h of exposure to obtain a layer around ~57 μm conformed by FeB, Fe2B, and others alloying elements. Firstly, the presence of iron borides formed on the surface of borided AISI 316L alloy was confirmed by optical microscopy combined with the X-ray diffraction analysis. After, the sensed Vickers indentation test was performed on the iron boride layer to estimate the behavior of hardness and Young’s modulus. Sliding wear tests on the borided AISI 316L alloy were performed according to the ASTM G133-05 standard procedure, with the following conditions: distances of 50 and 150 m, normal loads of 5 and 20 N, and a sliding speed of 30 mm/s. Finally, the results showed that the presence of FeB-Fe2B improves the resistance to wear around 41 times compared to the untreated material.

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Interfacial indentation test of FeB/Fe2B coatings

Cited by 38 publications

References 23 publications

Effect of spin polarization on the structural properties and bond hardness of Fe x B (x = 1, 2, 3) compounds first-principles study

Effect of spin polarization on the structural properties and bond hardness of Fe x B (x = 1, 2, 3) compounds first-principles study

Damage Mechanisms in AISI 304 Borided Steel: Scratch and Daimler-Benz Adhesion Tests

Mechanical characterization of the AISI 316L alloy exposed to boriding process

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