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Hall-Petch strengthening: yield strength = σ₀ + k·d^(-1/2), where d is grain diameter; primary strengthening mechanism.

Guia passo a passo

  1. 1Input material constants σ₀ and k
  2. 2Vary grain size
  3. 3Calculate predicted yield strength

Exemplos resolvidos

Entrada
Steel: σ₀ = 50 MPa, k = 0.8 MPa√mm
Resultado
1mm grains → 50.8 MPa, 0.01mm → 80 MPa strength increase

Erros comuns a evitar

  • Using wrong units for grain size
  • Applying beyond material's valid range

Perguntas frequentes

Is Hall-Petch always linear?

Approximately yes; breaks down at very small grain sizes (<100 nm).

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