Influence of Martensitic Structure and Carbide Precipitation Behavior on Mechanical Properties of 25CrMoNbB Alloy Steels with Mo Contents of 0.25 and 0.5 Pct

Zheng, Yaxu; Wang, Fuming; Garrison, Warren M.; Lin, Yu‐Ju; Li, Changrong

doi:10.1007/s11661-018-4766-1

Cited by 4 publications

(1 citation statement)

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“…Mo has a large effect on the other carbides precipitates. The addition of Mo to steel promotes the nucleation of MC-type carbides such as (Ti, Mo)C, (Nb, Mo)C and (Mo, V)C, which can easily form precipitates with diameters less than 20 nm because Mo can not only reduce the interfacial and Gibbs free energies of the precipitates but also reduce the size and retard the coarsening of precipitates (Nagao et al , 2018; Zheng et al , 2018). Therefore, the present study of Mo focuses on the role of coprecipitates with the other microalloying elements on the HE resistance of steels.…”

Section: Types Of Metal Carbide Nanoprecipitatesmentioning

confidence: 99%

Review of metal carbide nanoprecipitate effects on hydrogen embrittlement of high strength martensitic steel

Zheng

Sun

Yan

et al. 2022

ACMM

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Purpose High-strength martensitic steels having strong hydrogen embrittlement (HE) susceptibility and the metal carbide (MC) nanoprecipitates of microalloying elements such as Nb, V, Ti and Mo in the steel matrix can effectively improve the HE resistance of steels. This paper aims to review the effect of MC nanoprecipitates on the HE resistance of high-strength martensitic steels. Design/methodology/approach In this paper, the effects of MC nanoprecipitates on the HE resistance of high-strength martensitic steels are systematically described in terms of the types of MC nanoprecipitates, the influencing factors, along with numerical simulations. Findings The MC nanoprecipitates, which are fine and semicoherent with the matrix, effectively improve the HE resistance of steel through the hydrogen trapping effects and microstructure optimization, but its effect on the HE resistance of steel is controlled by its size, number and distribution state. Originality/value This paper summarizes the effects and mechanisms of MC nanoprecipitates on HE performance of high-strength martensitic steel and provides the theoretical basis for corrosion engineers to design high-strength martensitic steels with excellent HE resistance and improve production processes.

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Section: Types Of Metal Carbide Nanoprecipitatesmentioning

confidence: 99%