Microstructure changes in Zr–1Nb alloy after pulsed electron beam surface modification and hydrogenation

Pushilina, Natalia; Kudiiarov, Viktor N.; Laptev, Roman; Лидер, А. М.; Тересов, А. Д.

doi:10.1016/j.surfcoat.2015.07.082

Cited by 26 publications

(10 citation statements)

References 33 publications

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“…Вначале кратко опишем условия эксперимента (подробнее см. [15]). Пластина из сплава Zr−1N b шлифуется с одной стороны, другая сторона практически водородонепроницаема, торцами пренебрегаем; температура образца T и давление газообразного водорода p поддерживаются постоянными (предпринимаются специальные меры охлаждения).…”

Section: математическая модель гидрированияunclassified

“…При разработке математической модели гидрирования авторы следовали работе [15]. Проблема состоит в моделировании динамики свободной границы фазового перехода и оценке распределений концентраций в гидриде и в сплаве.…”

Section: Introductionunclassified

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Boundary-value problem with free boundary: zirconium alloy hydrogenation

Заика¹,

Rodchenkova²,

Zaika

2016

Proceedings of KarRC of RAS

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Институт прикладных математических исследований Карельского научного центра РАН Одним из важных требований к изделиям из циркониевых сплавов активной зоны реакторов является низкое поглощение водорода, поскольку водородное охрупчивание может стать одной из причин разрушения циркониевой оболочки. В зависимости от уровня содержания водорода и температуры эксплуатации водород может находиться в циркониевых сплавах в виде твердого раствора или в виде гидридов. Наибольший охрупчивающий эффект оказывают гидриды, так как они могут служить участками образования и развития трещин. Проблема состоит в моделировании динамики свободной границы фазового перехода и оценке распределений концентраций в гидриде и в сплаве. В статье представлены математическая модель гидрирования циркониевого сплава с учетом фазового перехода (гидридообразования), итерационный вычислительный алгоритм решения нелинейной краевой задачи со свободной границей раздела фаз на основе неявных разностных схем и результаты вычислительных экспериментов. К л ю ч е в ы е c л о в а: гидрирование; нелинейные краевые задачи со свободной границей; разностные схемы; численное моделирование.

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Section: математическая модель гидрированияunclassified

Section: Introductionunclassified

Boundary-value problem with free boundary: zirconium alloy hydrogenation

Заика¹,

Rodchenkova²,

Zaika

2016

Proceedings of KarRC of RAS

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“…Nowadays, there are numerous methods applied for improving hydrogen and oxidation resistance, such as the addition of stabilizing additives (yttrium) [17,18], deposition of thin solid films [19][20][21], micro-arc oxidation [22], as well as the modification of the surface by electron beam treatment [23]. Despite the multiplicity of the methods these problems are still relevant.…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of Zr–1Nb Corroded in Air at 400 °C after Plasma Immersion Titanium Implantation

Obrosov

Sutygina

Manakhov

et al. 2018

Metals

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In this paper, the influence of plasma immersion titanium implantation into the zirconium alloy Zr-1Nb on the oxidation behavior at 400 • C for 5, 24, 72, and 240 h in air under normal atmospheric pressure (101.3 kPa) was shown. The influence of implantation on the protective properties of the modified layer was shown. The valence of the oxides before and after implantation was analyzed by means of X-ray photoelectron spectroscopy (XPS). Grazing incidence X-ray diffraction (GIXRD) was carried out to examine the phase composition after titanium ion implantation and oxidation. Differential scanning calorimetry (DSC) revealed that titanium implantation exhibited effects of stabilizing the β phase. The formation of the t-ZrO 2 and m-ZrO 2 was observed during the oxidation of the as-received and modified Zr-1Nb. The measurement of weight gain showed an improvement in oxidation resistance of Ti implanted Zr-1Nb at the oxidation up to 24 h when compared with that of the as-received Zr-1Nb. However, at longer oxidation cycle the oxidation rate of Ti-implanted zirconium alloy is the same with the as-received alloy, which attributed to the layer thickness. Nevertheless, the corrosion of the Ti-implanted alloy is more uniform, while a local corrosion and cracks was detected on the surface of the as-received alloy.

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“…Surface modification by Low Energy High Current Pulsed Electron Beam (LEHCPEB) is advance method for hydrogen permeation decreasing. This effect is caused by quenching structure formation in surface layer after irradiation and thin oxide film formation [11][12][13][14]. This work is focused on the investigation of surface state (initial state, after ion cleaning with subsequent nickel deposition, modification by pulsed electron beam) influence on the hydrogen behavior of zirconium alloy Zr1Nb.…”

Section: Introductionmentioning

confidence: 99%

Influence of surface state on hydrogen sorption by zirconium alloy Zr1Nb

Kudiiarov¹,

Babikhina²,

Pushilina³

et al. 2016

AIP Conference Proceedings

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This work is focused on the investigation of hydrogen sorption behavior by zirconium alloy Zr1Nb with different surface states. Zirconium alloy samples in initial state, after ion cleaning with subsequent nickel deposition and after treatment by Low Energy High Current Pulsed Electron Beam (LEHCPEB) were hydrogenated at constant pressure and different temperatures. Hydrogen sorption rates as well as the energy of hydrogen adsorption by zirconium alloy with different surface states have been evaluated. It was shown, that ion cleaning with subsequent nickel deposition leads to the hydrogen sorption rate increasing at temperatures 350 – 550 °C, while the energy of hydrogen adsorption by zirconium alloy reduces on 15%. Modification by LEHCPEB leads to the hydrogen sorption rate decreasing at temperatures 350 – 550 °C, while the energy of hydrogen adsorption by zirconium alloy grows on 15%

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Microstructure changes in Zr–1Nb alloy after pulsed electron beam surface modification and hydrogenation

Cited by 26 publications

References 33 publications

Boundary-value problem with free boundary: zirconium alloy hydrogenation

Boundary-value problem with free boundary: zirconium alloy hydrogenation

Oxidation Behavior of Zr–1Nb Corroded in Air at 400 °C after Plasma Immersion Titanium Implantation

Influence of surface state on hydrogen sorption by zirconium alloy Zr1Nb

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