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Radiation effects on creep rupture and fatigue strength of pure aluminum

Purpose of investigation is to study experimentally the effect of nuclear radiation for the ratios of alternating stress to mean stress ranging from zero to infinity

Abstract

Paper describes an experimental investigation on the effect of nuclear radiation on the creep rupture and fatigue strength of pure aluminum for the ratios of alternating stress to mean stress ranging from zero to infinity. It was found that not only was the strength of the material tested affected by radiation over a range of ratios of stresses, but also the brittle-ductile transition was influenced.

Based upon the experimental results obtained, an analytical model was developed to correlate creep rupture, fatigue strength and radiation effect for various ratios of stresses. This information may prove to be valuable in dealing with the stress analysis of nuclear reactors.

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Abbreviations

σ:

stress rupture, psi

σ f :

completely reversible stress, psi

σ a :

alternating fatigue stress, psi

σ m :

static mean stress, psi

t :

time to rupture, hr

N :

number of cycles to failure

Φ:

integrated fast neutron flux, nvt

A :

stress ratio =\(\frac{{\sigma _a }}{{\sigma _m }}\)

σ max :

σ m + σ a , maximum stress, psi

σ y :

yield stress

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Zamrik, S.Y., Hu, L.W. Radiation effects on creep rupture and fatigue strength of pure aluminum. Experimental Mechanics 7, 193–201 (1967). https://doi.org/10.1007/BF02326509

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Keywords

  • Radiation
  • Aluminum
  • Fatigue
  • Mechanical Engineer
  • Fluid Dynamics