Effect of carbon and hydrogen on physical and mechanical properties and servicing characteristics of structural steels

Uzlov, I. G.; Prikhodyko, E.V.; Shkola, V. I.

doi:10.1016/s0360-3199(96)00182-6

Cited by 1 publication

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“…The dissolved hydrogen in steel leads to drastic changes in its physical, chemical, and mechanical properties. [13,14] The most significant effect is the severe deterioration of the mechanical properties of high-strength steel, which is manifested as the remarkable loss of plasticity. Gong [15] studied the hydrogen embrittlement failure mechanism of advanced high-strength steel and found that hydrogen charging severely deteriorated the plasticity and toughness of high-strength steel, resulting in quasicleavage fracture failure at yield in a tensile test.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Diffusion and Hydrogen Embrittlement Failure Behavior of AH36 Marine Steel Subjected to High Heat Input Welding

Zhang

Cui

et al. 2022

steel research int.

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AH36 marine steel processed through high heat-input welding is subjected to microstructural characterization, hydrogen permeation test, internal friction test, and slow strain rate tensile test to reveal its hydrogen diffusion and hydrogen embrittlement failure behaviors. Compared with the base metal, the coarsegrained heat-affected zone (CGHAZ) exhibits a significantly coarsened microstructure and decreased hydrogen trap density, resulting in a high hydrogen diffusion coefficient and short hydrogen permeation time. The presence of hydrogen yields a hydrogen-induced Snoek internal friction peak and promotes the movement of the Snoek-Kê-Köster internal friction peak to the lowtemperature region. In addition, B and Kê peaks, which are not found in the base metal, appear in the CGHAZ. With increasing hydrogen content, the plastic loss and brittle fracture of the AH36 marine steel become increasingly significant, and the hydrogen embrittlement sensitivity of the heat-affected zone increases compared with that of the base metal. The discontinuous yield phenomenon gradually disappears under slow strain rate tension owing to the weak pinning effect of the Cottrell atmosphere on mobile dislocations.

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Section: Introductionmentioning

confidence: 99%