Characterization of boronized layers on a XC38 steel

Allaoui, Omar; Bouaouadja, N.; Saindernan, G.

doi:10.1016/j.surfcoat.2006.07.238

Cited by 122 publications

(70 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The test procedure that is best known and most used for adhesion measuring of hard coatings on steel substrates is the scratch test. Allaoui et al 8 studied coating/substrate system adhesion by scratches developed in borided XC38 steel (medium carbon steel) by immersion in molten salts, concluding that the best performance was obtained on a single-phase layer with critical load of 132 N. Taktak 9 identified the delamination failure characteristics of boride-coated Cr based steels by Rockwell C adhesion test. The boriding was carried out using a slurry salt bath.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

View full text Add to dashboard Cite

show abstract

“…During this process, temperatures of 973-1273 K and processing times of 1-10 h are typically used [1][2][3]. Since boron is a relatively small size element, it easily diffuses into a variety of metals, including Fe and Co-based alloys and refractory materials [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…According to the Fe-B phase diagram, boron forms two different iron borides, FeB and Fe 2 B [1]. The boronizing of ferrous materials results in the formation of either single phase or double phase iron boride layer with definite composition.…”

Section: Introductionmentioning

confidence: 99%

Oxidation stability of boride coatings

Ptačinová¹,

Drienovský²,

Palcut³

et al. 2016

View full text Add to dashboard Cite

In this work, plain, low carbon steel S235JRG1 was boronized at 1273 K for 45-150 min by using a Durborid powder. The microstructure, phase constitution and oxidation behavior of the resulting boride layers have been investigated. Layers with an average thickness of 76-123 µm have been produced. The boride layer has a distinct tooth-like microstructure. It is composed of Fe2B and FeB in unequal amounts. The boride layer oxidation behavior has been investigated by a simultaneous thermal analysis in a flowing synthetic air at 873-1173 K for 21-24 h. A parabolic oxidation of the boride layer has been observed. The rate constants are found between 1.039 × 10 −9 to 3.781 × 10 −6 kg 2 m −4 s −1 , depending on temperature and oxidation time. The activation energy of oxidation at temperatures below 1173 K has been estimated to be 93 kJ mol −1 . At 1173 K, two successive parabolic periods have been found, followed by a breakaway oxidation behavior. The oxide scale of the boronized steel is composed of different iron oxides and iron borates. The oxidation mechanisms of boride coatings are discussed and implications towards high temperature stability are provided.K e y w o r d s : boronizing, high temperature oxidation, X-ray diffraction, thermogravimetric analysis

show abstract

“…According to the Fe-B equilibrium phase diagram, there are two stable iron borides at ambient temperature: single boride layer (Fe 2 B) or double (FeB and Fe 2 B) layers [4]. The metastable phase, Fe 3 B, appears during formation of Fe 2 B.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic elastic properties of FexB (x = 1, 2, 3) under pressure. First-principles study

Gueddouh

Bentria

Bourourou³

et al. 2016

Materials Science-Poland

View full text Add to dashboard Cite

Spin-polarization (SP) and pressure effects have been used to better clarify and understand anisotropic elastic properties of Fe-B intermetallic compounds using the first-principles calculation with generalized gradient approximation (GGA) within the plane-wave pseudopotential density functional theory. Elastic properties, including bulk, shear and Young's moduli as well as Poisson ratio were obtained by Voigt-Reuss-Hill approximation. All studied Fe-B compounds were mechanically stable. The brittle and ductile properties were discussed using bulk to shear moduli ratio (B/G) of the studied structures in the pressure range of 0 GPa to 90 GPa in order to predict the critical pressure of phase transition from ferromagnetic (FM) to nonmagnetic (NM) state. Mechanical anisotropy in both cases was discussed by calculating different anisotropic indexes and factors. We have plotted three-dimensional (3D) surfaces and planar contours of the bulk and Young's moduli of Fe x B (x = 1, 2, 3) compounds for some crystallographic planes, (1 0 0), (0 1 0) and (0 0 1), to reveal their elastic anisotropy. On the basis of anisotropic elastic properties the easy and hard axes of magnetization for the three studied compounds were predicted.

show abstract

Characterization of boronized layers on a XC38 steel

Cited by 122 publications

References 18 publications

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

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

Oxidation stability of boride coatings

Anisotropic elastic properties of FexB (x = 1, 2, 3) under pressure. First-principles study

Contact Info

Product

Resources

About