What does this research mean for the field?

In FeCrNi-based austenitic stainless steels, chromium increases and nickel decreases the activation energy for hydrogen migration, while high hydrogen concentrations and elevated temperatures synergistically accelerate material failure by promoting dislocation-mediated plasticity and vacancy formation. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

The aim is to explore how hydrogen diffusion and deformation mechanisms are influenced by alloy composition, temperature, and hydrogen concentration in austenitic stainless steels.

May 20, 2026MoleculesOpen Access

Atomistic Insights into Hydrogen Diffusion and Deformation Mechanisms in FeCrNi-Based Austenitic Stainless Steels: Effects of Alloying, Temperature, and Hydrogen Concentration

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Authors

JLJiaqing LiFuzhou University ZHZubin HuangFuzhou University LZLiang ZhangChongqing University

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Implication

Molecular dynamics simulations reveal the effects of alloy composition, temperature, and hydrogen concentration on hydrogen diffusion and deformation in stainless steels, suggesting tailored...

Key Points

The aim is to explore how hydrogen diffusion and deformation mechanisms are influenced by alloy composition, temperature, and hydrogen concentration in austenitic stainless steels.
Employed molecular dynamics simulations to analyze hydrogen behavior in FeCrNi-based alloys.
Conducted Arrhenius analysis to evaluate activation energy for hydrogen migration based on alloy composition.
Examined the impact of temperature and hydrogen concentration on phase transformations and dislocation activity.
Low Cr and Ni contents (6 wt.%) induce martensitic transformations leading to stress drops.
High Cr or Ni levels (24 wt.%) favor dislocation plasticity, reducing martensitic transformations.
Elevated temperatures combined with high hydrogen concentrations enhance dislocation-mediated plasticity, promoting material failure.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a0d5122f03e14405aa9d87d https://doi.org/10.3390/molecules31101688

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Implication

Molecular dynamics simulations reveal the effects of alloy composition, temperature, and hydrogen concentration on hydrogen diffusion and deformation in stainless steels, suggesting tailored...

Atomistic Insights into Hydrogen Diffusion and Deformation Mechanisms in FeCrNi-Based Austenitic Stainless Steels: Effects of Alloying, Temperature, and Hydrogen Concentration

Discussion

Member takes

Implication

Key Points

Cite This Study

Atomistic Insights into Hydrogen Diffusion and Deformation Mechanisms in FeCrNi-Based Austenitic Stainless Steels: Effects of Alloying, Temperature, and Hydrogen Concentration

Discussion

Member takes

Implication

Key Points

Cite This Study

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