Iucluding Stacking Fault Energy Into The Resisting Stress Model For Creep Of Particle Strengthened Superalloys
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Abstract
Af the base of steady state creep rate eguation for multicompment particle-strengthened alloys and in condideration of the stacking fault energie and resisting stress theory in creep, a new generalized steady-state creep rate equation is proposed:
\mathop \rm\varepsilon \limits^\rm\cdot \rms=\rmA''(rs)^\rmno\frac\sigma -\sigma _\rmp\rmE(\rmT)^\rmno\exp (-\frac\rmQ\rmRT)
The applicability of this equation is assessed by the creep of Ni-Co binary alloys, several γ' or oxide dispersion strengthened nickel-base superalloys, low γ' fraction strengthened nickel-base superalloys (Waspaloy) with different contents of cobalt and high fraction γ' strengthened nickel-base superalloys (Udimet‰) with different contents of cobalt. The result of this assessment is available.
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