Publication

Mechanical-Properties and Microstructure of 600-Mev Proton-Irradiated Copper Single-Crystals

Maximo Pedro Victoria
1994
Journal Articles

Abstract

Low dose (10(-4) - 10(-2) dpa) irradiation of high-purity (99.99%) copper single crystals were performed in the PIREX facility with 600 MeV protons at room temperature. The irradiation hardening effects are investigated by measuring the yield stress or critical resolved shear stress changes and the irradiation induced defect microstructure has been observed under transmission electron microscopy. The variations of the yield stress and defect density as a function of the irradiation fluence are comparable to the existing data from neutron irradiations at similar fluence.

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https://infoscience.epfl.ch/entities/publication/819b49cc-f1ce-4a20-8654-f1147734ad04

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Maximo Pedro Victoria
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/819b49cc-f1ce-4a20-8654-f1147734ad04

About this result

Related concepts (32)

Neutron radiation

Neutron radiation is a form of ionizing radiation that presents as free neutrons. Typical phenomena are nuclear fission or nuclear fusion causing the release of free neutrons, which then react with nuclei of other atoms to form new nuclides—which, in turn, may trigger further neutron radiation. Free neutrons are unstable, decaying into a proton, an electron, plus an electron antineutrino. Free neutrons have a mean lifetime of 887 seconds (14 minutes, 47 seconds). Neutron radiation is distinct from alpha, beta and gamma radiation.

Neutron activation

Neutron activation is the process in which neutron radiation induces radioactivity in materials, and occurs when atomic nuclei capture free neutrons, becoming heavier and entering excited states. The excited nucleus decays immediately by emitting gamma rays, or particles such as beta particles, alpha particles, fission products, and neutrons (in nuclear fission). Thus, the process of neutron capture, even after any intermediate decay, often results in the formation of an unstable activation product.

Frenkel defect

In crystallography, a Frenkel defect is a type of point defect in crystalline solids, named after its discoverer Yakov Frenkel. The defect forms when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy and becomes an interstitial by lodging in a nearby location. In elemental systems, they are primarily generated during particle irradiation, as their formation enthalpy is typically much higher than for other point defects, such as vacancies, and thus their equilibrium concentration according to the Boltzmann distribution is below the detection limit.

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