An atom probe tomography prototype with laser evaporation

Рогожкин, С. В.; Aleev, A. A.; Lukyanchuk, A. A.; Шутов, А. С.; Разницын, О. А.; Kirillov, S. E.

doi:10.1134/s002044121702021x

Cited by 41 publications

(6 citation statements)

References 23 publications

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“…It seems that the formation of dislocation loops plays the main role in the low-temperature radiation hardening of Eurofer 97 at the dose up to ~10 dpa. The hardening due to nucleation of Cr-enriched embryos calculated on the PCF model [11] and DBH model with the value of the barrier strength of α Cr clust = 0.03 [20] is less than 50 MPa for Eurofer 97 irradiated to 6 dpa at 400 °C and it is considerably smaller than the revealed dislocation loop hardening under the same irradiation conditions.…”

Section: Radiation-induced Hardeningmentioning

confidence: 82%

“…Samples for APT were also cut and lifted out with FIB from the irradiated samples at various depths from the irradiated surface. APT studies were carried out with an APPLE-3D (ITEP) [11] atom probe microscope in laser evaporation mode with the wave length of 515 nm. Data collection was carried out at the sample temperature of 50 K, laser frequency of 25 kHz and pulse energy of 0.1-5 µJ.…”

Section: Methodsmentioning

confidence: 99%

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The influence of Fe-ion irradiation on the microstructure of reduced activation ferritic-martensitic steel Eurofer 97

et al. 2019

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Reduced activation ferritic/martensitic steels for in-vessel components of a fusion reactor have shown a decrease in plasticity and radiation hardening at low irradiation temperatures. The formation of dislocation loops and embryos of α′ phase is considered the main reason for these effects. In this work, Eurofer 97 steel was irradiated with 5.6 MeV Fe2+ ions up to 1020 m−2 at 250, 300 and 400 °C. Transmission electron microscopy study of ion irradiated samples revealed nucleation of dislocation loops. The pair-correlation analysis of atom probe tomography data detected an initial stage of solid solution decomposition. The hardening of ion-irradiated Eurofer 97 was calculated with the dispersed barrier hardening model, taking into account radiation-induced dislocation loops to compare it with the change of yield stress in neutron-irradiated Eurofer 97. According to the obtained results, it can be supposed that the formation of dislocation loops plays the main role in the low-temperature radiation hardening of Eurofer 97 at a dose level up to ~10 dpa.

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Section: Radiation-induced Hardeningmentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

The influence of Fe-ion irradiation on the microstructure of reduced activation ferritic-martensitic steel Eurofer 97

et al. 2019

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“…Conventional coarse-grained stainless 316 steel [4] was nanostructured by high pressure torsion (HPT) by straining to a steady state. Three NC states were prepared: To reveal fine microstructural features, Atom Probe Tomography (APT) analyses were carried out with the APPLE-3D device [9]; TEM and XRD studies were performed using JEOL JEM 2100 microscope and Bruker D8 diffractometer, respectively. Tensile tests were carried out at room temperature with Shimadzu AGX-50 Plus machine adjusted for testing mini-specimens.…”

Section: Methodsmentioning

confidence: 99%

Plasticity of an extra-strong nanocrystalline stainless steel controlled by the “dislocation-segregation” interaction

et al. 2021

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We study three structurally different states of nanocrystalline 316 steel and show that the state, where boundaries containing excess concentration of alloying elements are combined with mobile dislocations in grain interiors, allows maintaining extraordinarily high strength and remarkably enhanced plasticity. Underlying mechanisms featuring interaction between the segregations and mobile dislocations are discussed.

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“…Для исследования исходной структуры образцов был проведен атомно-масштабный анализ распределений атомов химических элементов в исследуемых сплавах. Этот анализ проводился с использованием установки для атомнозондовой томографии ПАЗЛ-3D (ИТ-ЭФ) [49]. При проведении исследований температура образцов составляла порядка 50 K. Данные были собраны при постоянном напряжении на образцах 1 ÷ 9 kV, длительности одного лазерного импульса -300 fs, частоте лазерных импульсов -25 kHz, энергии одного импульса -0.1 ÷ 5 mJ, с длиной волны гармоники лазерного излучения -515 nm.…”

Section: экспериментальные методыunclassified

Экспериментально-теоретическое исследование эволюции атомной структуры высокоэнтропийных сплавов на основе Fe, Cr, Ni, Mn и Co при термическом и радиационном старении

Мешков¹,

Новоселов²,

Янилкин³

et al. 2020

Физика Твердого Тела

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The comprehensive experimental and theoretical study of the processes of local ordering of multicomponent alloys was carried out. Experimental techniques included atom-probe tomography and measurement of electrical resistivity during isochronal annealing. The theoretical study was carried out by atomistic modeling methods. The evolution of the system was described in the framework of the multiscale paradigm which is based on quantum-mechanical calculations. The initial stage of the decomposition of a solid solution of CoCrFeNi alloy with the formation of Ni4Cr and Ni2Cr precipitations was demonstrated for the first time by the employed approach.

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An atom probe tomography prototype with laser evaporation

Cited by 41 publications

References 23 publications

The influence of Fe-ion irradiation on the microstructure of reduced activation ferritic-martensitic steel Eurofer 97

The influence of Fe-ion irradiation on the microstructure of reduced activation ferritic-martensitic steel Eurofer 97

Plasticity of an extra-strong nanocrystalline stainless steel controlled by the “dislocation-segregation” interaction

Экспериментально-теоретическое исследование эволюции атомной структуры высокоэнтропийных сплавов на основе Fe, Cr, Ni, Mn и Co при термическом и радиационном старении

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