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SurfaceToVolumeEffects

oxiphysics_materials::nano::types

Struct SurfaceToVolumeEffects 

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pub struct SurfaceToVolumeEffects {
    pub k_hp: f64,
    pub sigma_0: f64,
    pub d_breakdown_nm: f64,
    pub surface_energy: f64,
    pub surface_stress: f64,
    pub d_atom_nm: f64,
}
Expand description

Surface-to-volume ratio effects: Hall-Petch breakdown and surface stress.

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§k_hp: f64

Hall-Petch slope k_HP (MPa·μm^0.5).

§sigma_0: f64

Friction stress σ_0 (MPa).

§d_breakdown_nm: f64

Hall-Petch breakdown grain size d_0 (nm).

§surface_energy: f64

Surface energy γ (J/m²).

§surface_stress: f64

Surface stress τ_s (N/m).

§d_atom_nm: f64

Atom diameter d_atom (nm).

Implementations§

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impl SurfaceToVolumeEffects

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pub fn nc_copper() -> Self

Nanocrystalline copper model.

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pub fn nc_iron() -> Self

Nanocrystalline iron model.

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pub fn yield_strength_mpa(&self, grain_size_nm: f64) -> f64

Hall-Petch yield strength (MPa). Below d_breakdown, returns softening estimate.

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pub fn surface_to_volume_ratio(&self, diameter_nm: f64) -> f64

Surface-to-volume ratio for a sphere of diameter d (nm): S/V = 6/d.

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pub fn surface_atom_fraction(&self, diameter_nm: f64) -> f64

Fraction of surface atoms in a spherical nanoparticle.

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pub fn capillary_pressure_mpa(&self, radius_nm: f64) -> f64

Capillary pressure (MPa) inside a spherical nanoparticle.

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pub fn melting_point_depression( &self, t_m_bulk: f64, h_f: f64, rho: f64, d_nm: f64, ) -> f64

Melting point depression ΔTm (K) via Gibbs-Thomson: ΔTm = 4γTm/(ΔHfρd).

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