Creep Deformation

Time-dependent plastic flow at elevated temperature

Stage: Primary | ε: 0.000 | ε̇: 0.00 s⁻¹ | Ruptured: No

Temperature (°C) 700

Applied Stress (MPa) 100

Stress Exponent n 3.0

Activation Energy Q (kJ/mol) 200

Creep rate (Norton power law): ε̇ = A σⁿ exp(−Q/RT). Three stages: Primary (decreasing ε̇, dislocation rearrangement), Secondary (constant ε̇ — steady-state: hardening = recovery), Tertiary (accelerating, void coalescence → fracture). Monkman-Grant: ε̇_ss × t_r = C (constant). Larson-Miller parameter P = T(C + log t_r) combines temperature and time for creep life prediction.