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Isokawa, Kenji; Namiki, Kunio

doi:10.4262/denkiseiko.54.75

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Influence Of Phosphorus and Boron On He Susceptibility1

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2002

2009

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“…In either event, the susceptibility to intergranular cracking increases because of the interaction between segregated phosphorus and hydrogen atom at prior austenitic grain boundaries. Isokawa and Namiki 26) investigated the effect of sulphur on the susceptibility of high strength steels for bolts to delayed fracture. They obtained the similar results and reported that the in- tergranular fracture was induced by both sulphur segregation and hydrogen degradation.…”

Section: Influence Of Phosphorus and Boron On He Susceptibilitymentioning

confidence: 99%

Influence of Phosphorus and Boron on Hydrogen Embrittlement Susceptibility of High Strength Low Alloy Steel

2003

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Section: Influence Of Phosphorus and Boron On He Susceptibilitymentioning

confidence: 99%

Influence of Phosphorus and Boron on Hydrogen Embrittlement Susceptibility of High Strength Low Alloy Steel

2003

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Microstructure Refining and Strengthening of Martensitic Steel

Wang

2009

Ultra-Fine Grained Steels

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Structural Steels. Delayed Fracture Resistance of High Temperature Tempered NiCrMoV Steel for Bolts. (2).

Kimura¹

2002

DENKI-SEIKO[ELECTRIC FURNACE STEEL]

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SynopsisFor fasteners the author had designed the steel tempered at 873K, which showed the delayed fracture life at a higher stress level in a static bending test substantially longer than tempered at 703K to the equivalent tensile strength 1500MPa. The cathodic charge introduced a larger amount of diffusible hydrogen into NiCrMoV. The finely dispersed M 2 C or MC precipitates in NiCrMoV trapped tightly some portion of the hydrogen, which didn't diffuse at all at RT. The obtained results suggest that the hydrogen trapping effect of the carbides retards the initiation of hydrogen-induced cracking and so extends the delayed fracture life of NiCrMoV tempered at higher temperatures.

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Cited by 3 publications

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Influence of Phosphorus and Boron on Hydrogen Embrittlement Susceptibility of High Strength Low Alloy Steel

Influence of Phosphorus and Boron on Hydrogen Embrittlement Susceptibility of High Strength Low Alloy Steel

Microstructure Refining and Strengthening of Martensitic Steel

Structural Steels. Delayed Fracture Resistance of High Temperature Tempered NiCrMoV Steel for Bolts. (2).

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