Thermal affection on hydrogen diffusion in different structures of nickel alloy

Pasquale Cavaliere; Behzad Sadeghi; Chen Zhenghan; Alicja Stanisławska

doi:10.1108/mmms-10-2024-0310

Thermal affection on hydrogen diffusion in different structures of nickel alloy

Abstrakt

Purpose Based on previous research, we choose nickel alloy 718 as the research material and use finite element analysis (FEA) to simulate the hydrogen diffusion in lattice, grain, boundary grain and dislocation in different thermal loads, aiming to understand the intricate mechanisms underlying hydrogen diffusion in nickel-based alloys, which will contribute to driving progress in the field of hydrogen diffusion for understanding and management HE. Design/methodology/approach In this research, we focus on nickel alloy 718, creating a numerical model with traps to simulate the hydrogen diffusion in lattice, grain, boundary grain and dislocation with different thermal loads, by FEA. Findings The results demonstrated that traps improve the hydrogen saturation in materials, and because of thermal saturation and heat flux, higher temperatures decrease the hydrogen solubility and increase hydrogen diffusion velocity, which can decrease hydrogen saturation. Originality/value Based on our previous research and publications, we developed a finite element model to define the hydrogen trapping in different microstructural features of nickel-based superalloys. The model is very complex with a very large number of elements capable of obtaining very affordable results.

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Słowa kluczowe

HYDROGEN EMBRITTLEMENT, HYDROGEN DIFFUSION, NICKEL ALLOY, FINITE ELEMENT ANALYSIS

Informacje szczegółowe

Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach dostępnych w wersji elektronicznej [także online]

Opublikowano w:

Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105

Język:

angielski

Rok wydania:

2025

Opis bibliograficzny:

Cavaliere P., Sadeghi B., Zhenghan C., Stanisławska A., Thermal affection on hydrogen diffusion in different structures of nickel alloy, Multidiscipline Modeling in Materials and Structures, 2025,10.1108/mmms-10-2024-0310

DOI: