An expression to determine the Vickers indentation fracture toughness obtained by the finite element method on Fe2B layers

Meneses-Amador, A.; Campos-Silva, I.; Martínez-Trinidad, J.; Panier, S.; Figueroa-López, U.; Torres-Hernández, A.

doi:10.1016/j.surfcoat.2012.06.091

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…Shear modulus Table 3 Vickers hardness and fracture toughness of Fe 2 B with reported data taken from the literature 7,8,10,19) Vickers hardness Evaluated indent has cracks, b) DCM: Direct crack mesurement 25) , c) A: Calculation from the indent and crack length 26) , d) B: Calculation from the indent and crack length 27) , e) C: Calculation from the indent and crack length 28) , f) FEM: Finite element method.…”

Section: Imentioning

confidence: 99%

Mechanical and Thermal Properties of Fe<sub>2</sub>B

Nakamori

Ohishi

Kumagai

et al. 2016

Transactions of the Atomic Energy Society of Japan

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Fe 2 B appears to have formed in the fuel debris at the Fukushima Daiichi nuclear disaster site through the reaction between stainless steel and the control material B 4 C. In order to conduct defueling operations, understanding the physical properties of Fe 2 B is of extreme importance. In the present study, we have prepared an Fe 2 B bulk sample with 92.5％ theoretical density by spark plasma sintering of Fe 2 B powder, and we have evaluated the mechanical and thermal properties of the sample. The thermal diffusivity was measured by a laser flash method in an argon flow. The thermal conductivity was evaluated from the heat capacity, thermal diffusivity, and density. The electron thermal conductivity was calculated from measurement values of electric conductivity. The longitudinal and shear sound velocities were measured by a sing-around method at room temperature in air, which enables the elastic modulus and Debye temperature to be evaluated. The hardness measurements were performed at room temperature in air using a Vickers hardness tester. The fracture toughness was estimated from a crack produced by an indenter. The maximun Vickers hardness and fracture toughness were determined to be 12 GPa and 2.8 MPa m 0.5 , respectively.

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Section: Imentioning

confidence: 99%

Mechanical and Thermal Properties of Fe<sub>2</sub>B

Nakamori

Ohishi

Kumagai

et al. 2016

Transactions of the Atomic Energy Society of Japan

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“…FeB was prepared as nanoparticles by the chemical reduction method for the improvement of the cycle stability of the PuNi3-type hydrogen storage electrode. The properties such as structural, hardness, Young modulus and fracture toughness of iron boride layer depend on process time and temperature [5,6]. Their notable mechanical properties are due to the B-B covalent bonding associated to hybrid metal-nonmetal bonding.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Meneses-Amador et al [5] used indentation for the mechanical characterization of the Fe 2 B layer and found that layer hardness ranged from 9 to 14.2 GPa depending on boriding temperature and time. Furthermore, the mechanical properties of FeB and Fe 2 B layers were estimated by Berkovich Nano indentation on tool borided steels.…”

Section: Introductionmentioning

confidence: 99%

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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Trends in Thermochemical Techniques of Boriding

Kulka

2018

Engineering Materials

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An expression to determine the Vickers indentation fracture toughness obtained by the finite element method on Fe2B layers

Cited by 11 publications

References 26 publications

Mechanical and Thermal Properties of Fe<sub>2</sub>B

Mechanical and Thermal Properties of Fe<sub>2</sub>B

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

Trends in Thermochemical Techniques of Boriding

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