The stress/creep rate behaviour of precipitation-hardened alloys
作者： R. Lagneborg , B. Bergman
DOI: 10.1179/030634576790431462
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摘要: AbstractRecent experimental data of the stress/creep rate relationship for precipitation-hardened alloys have been surveyed. These materials display typically a higher stress-sensitivity creep than is observed pure metals, and solid solutions. Furthermore, their curves show pronounced breaks, with rate, ∂ ln έ/∂ σ, ∼4 below break. The precipitation dispersion affects such that it reaches minimum at an intermediate interparticle spacing, rates both larger smaller spacings. Based on principles recovery creep, theory has described, leading to type έ= A(έ-έp)4, where έp represents back stress due particle dispersion. At high stresses constant defined by operate particle-cutting mechanism or Orowan mechanism. lower dislocations are able bypass particles, s...
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