Fractality of Fractures of Aluminum and Titanium Alloys Irradiated by Intensive Electron Beam

The beams of ions of helium (EHe+= 4 МeV) affected samples of tungsten with purity 99.5%. The radiation characteristics of tungsten have been studied. The change in characteristics was caused by irradiation with helium ion beams. Numerical values of the number of vacancies and phonons were obtained depending on the depth of the layer in tungsten (maximum at a depth of 6.1 μm). The sputtering coefficients of atoms from the surface of tungsten are found. The mean free path of helium ions was up to 70 μm. It is determined that the maximum destruction of the surface occurs in the region of the pits. Pits appear in five times more than bubbles.

Section: The Main Partmentioning

confidence: 99%

FEATURES OF STRUCTURAL DAMAGES OF SURFACE OF TUNGSTEN AS A RESULT OF IRRADIATION WITH HELIUM ION BEAMS WITH ENERGY 4 MeV

Manuilenko,

Prokhorenko,

Pavlii

et al. 2023

“…Ensuring the operational reliability, specified service life and safety of nuclear installations, taking into account economic and environmental factors, is feasible with compliance with very strict requirements for these materials, taking into account the degradation of their physical and mechanical properties under the influence of high temperatures, neutron irradiation and corrosion in the coolant. An example of such requirements is the high radiation [3] and mechanical [4] durability of the structural materials of fuel elements and fuel assemblies, in particular, their dimensional stability. This problem has many aspects.…”

Section: Introductionmentioning

confidence: 99%

Bias for Prismatic Dislocation Loops in Zirconium. Numerical Analysis

Trotsenko¹,

Бабич²,

Ostapchuk³

2023

Using the analytical expression for the energy of elastic interaction of radiation point defects with a prismatic edge dislocation loop of zirconium (Burgers vector bD 1/ 3 <1120>, {11 2 0 }occurrence plane), the bias of loops of different nature (vacancy and interstitial) was calculated by the finite difference method. The toroidal geometry of the reservoir was used. It allowed one to calculate biases for loops of any size without any correction of the elastic field in its area of influence. In the dilatation center approximation the dependences of the loop bias on the loop radius were obtained. The principal possibility of coexistence of loops of different nature in the prismatic plane of zirconium is shown. A qualitative concept of the radiation growth (RG) mechanism was formulated within the framework of the classical elastic ideology.

“…A separate group of practical applications includes testing the resistance of materials from which cladding is made, to the action of extreme factors in the event of emergency situations. For example, to test the behavior of the surface protective layers of zirconium-based materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

The Simulation of Emergency Action on Construction Materials by High Current Relativistic Electron Beams

Donets,

Bryukhovetsky,

Lytvynenko

et al. 2023

Development of many innovative areas in energy, mechanical engineering, aircraft building and other industries is limited by the strength of materials under the action of temperature gradients. In this regard, the problem appears to find and justify technical means to model a complex of operating conditions. High-current relativistic electron beams reasonably belong to such instruments and means. As a result of their impact, pulsed electric and magnetic fields occur in the irradiated targets, temperature gradients are created, and shock waves are generated. The paper investigates the patterns of change in the internal structure of the blades of gas turbine engines and engineering materials, subjected to the action of an electron beam