Mechanisms of Creep and Recovery in Nimonic 80A
作者： D. Sidey , B. Wilshire
关键词: Dispersion (chemistry) 、 Activation energy 、 Alloy 、 Transient (oscillation) 、 Thermodynamics 、 Creep 、 Strain (chemistry) 、 Nimonic 、 Metallurgy 、 Chromium 、 Materials science
摘要: AbstractThe effect of a dispersion particles on high-temperature creep has been examined by comparing the and recovery properties Nimonic 80A with those single-phase nickel–20% chromium alloy at 750° C. Over most curve, strain any instant can be described accurately as ɛ = ɛ0 + T (l − e−mt) έ s t, where is instantaneous loading, t total transient strain, steady-creep rate, m constant relating to rate exhaustion creep. Measurements during steady-state suggest that this equation applies when proportional recovery. Deviations from occur initial 10–15% stage, are attributable rapid increase in coefficient work-hardening. Although activation energy for stress-dependence higher than values obtained single-phase...
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