The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics · 1958 · 14 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsMetallurgyTribologyDislocation MechanicsDislocation TheoryMetalsRadiation Damage In MaterialsDislocation BehaviorDislocation LinesDislocation PinningFrictionGamma Irradiation EffectsInternal FrictionLogarithmic DecrementMelting Point
Abstract Neutron irradiation, gamma irradiation and quenching all change the internal friction of pure polycrystalline rods of copper. Only if the rods are initially given an anneal near the melting point for many hours do these three treatments give consistent and similar results, and then the logarithmic decrement is reduced. It is concluded from the results that it is the vacancies introduced by each of the three treatments which pin the dislocation lines by diffusing to them, and that unless the purity of the copper is high their effect can be obscured.
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