Analysis Microstructural on Gray Cast Iron Boriding and Hydrogen of Permeation

Velázquez, I.; Perrusquia, N. López; Ruiz, M.A. Doñu; Bustos, Ernesto David García

doi:10.1017/s1431927619008742

Cited by 4 publications

(2 citation statements)

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“…Furthermore, the HE resistance of the AISI 8620 steel borided increases when the borided layer thickness is small. As well, a saw-tooth morphology at the FeB/ Fe 2 B and Fe 2 B/steel matrix interface is an indicator of a good adhesion; in this context, if proper adhesion then HE possibilities are reduced [31], as reported in [14,32,33]. Te saw morphology in the borided layer are efective to reduce the crack propagation, although they can not purely eliminate hydrogen embrittlement.…”

Section: Resultsmentioning

confidence: 90%

Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

Ruiz

Bustos

Ramirez³

et al. 2022

Advances in Materials Science and Engineering

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The present work studied the characterization of boriding coatings without and with exposed hydrogen permeation on AISI 8620 through microstructure and mechanical behavior. A dehydrated paste pack process was carried out for the formation of boride coatings on AISI 8620 at 1173, 1223, and 1273 K for 6 h of exposure time for each temperature. After boronizing, hydrogen was introduced into the borided steels by in situ cathodic charging using an H2SO4 acid electrolyte. Specimens borided without and with hydrogen were characterized by scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction. The experimental techniques of the Vickers microhardness and three-point bending were used. As a result, the hydrogen diffusion on steel AISI 8620 borided shows a significant increase in microhardness. Furthermore, three-point bend tests showed an increased strength on 8620 steel borided. However, the ductility and strength value on 8620 steel borided surfaces presented a drastic reduction due to hydrogen permeation. The results revealed that the borided coatings provided strength and reduced the hydrogen embrittlement index on AISI 8620 borided.

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Section: Resultsmentioning

confidence: 90%

Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

Ruiz

Bustos

Ramirez³

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Hydrogen embrittlement is one of the causes of failure of metallic materials in service, because of contact with hydrogen [3][4]. the engineering of manufacturing maritime, naval, geothermal, hydrocarbon transport, biofuel storage, automotive, metalworking, foundry, petrochemical and other areas have the problem that materials suffer alterations in the mechanical properties by the interaction with hydrogen; for this reason the demand in ferrous materials resistant the interaction with hydrogen [5][6].This work studies the effect of the microstructures obtained by different heat treatments proposed on a mechanical steel AISI 4140 steel exposed to hydrogen permeation. In addition, the evaluation of the mechanical property of maximum bending strength at fracture on specimens heat-treated with hydrogen permeation and without hydrogen permeation.…”

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confidence: 99%