Problems of modeling radiation damage in crystals

Agranovich, V.M.; Kirsanov, V. V.

doi:10.1070/pu1976v019n01abeh005118

Cited by 8 publications

(1 citation statement)

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“…However, the energy E is higher than the energy of replacement E r needed for the formation of a replacement chain in the atom set when the moving atom occupies the place of the first atom in the set, the first atom occupies the place of the second atom, and so on. This is the process of a dynamic crowdion [22][23]. Exchange of the atoms' positions does not result in distortion of the crystalline structure, but the order of the atom set is upset.…”

Section: Shape Memory Alloys: Properties Technologies Opportunitiesmentioning

confidence: 99%

Martensitic Transformation and Shape Memory Effect in TiNi-Based Alloys during Neutron Irradiation

Belyaev¹,

Chekanov²,

Kolobanov³

et al. 2015

MSFo

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The chapter is devoted to a study of the influence of neutron irradiation on the martensitic transformations and shape memory effects in TiNi-based shape memory alloys. Irradiation of the samples was carried out in the low-temperature helium loop of a WWR-M fusion reactor at Petersburg Nuclear Physics Institute in Gatchina (Russia). The experimental data showed that the variation in transformation temperatures depended on the irradiation temperature. The main factors influencing the variation in transformation temperatures during irradiation were disordering of the solid solution at low temperatures, radiation ordering at high temperatures, and thermally activated annealing of radiation damage. All of these mechanisms were taken into account in the differential equation given in the present work for description of the transformation temperature variation during irradiation at different temperatures. It was found that irradiation up to a fluence of 7⋅10 18 cm -2 did not suppress the transformation plasticity and shape memory effects in TiNi alloy in spite of the variation in transformation temperatures. It was observed that the shape memory effect may be initiated by irradiation up to a fluence of 5⋅10 20 cm -2 at a constant temperature (under isothermal conditions) due to a decrease in transformation temperatures.

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Section: Shape Memory Alloys: Properties Technologies Opportunitiesmentioning

confidence: 99%