Evaluation of variables affecting crack propagation by Delayed Hydride Cracking in Zr–2.5Nb with different heat treatments

Mieza, J.I.; Vigna, G.; Domizzi, G.

doi:10.1016/j.jnucmat.2011.01.101

Cited by 17 publications

(9 citation statements)

References 41 publications

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“…This behavior is ascribed to the bZr decomposition as was observed by Khatamian [17,18]. In the specimens treated at 380 Ce24 h, the b phase (with 66% of Nb [9]) can evolve to the equilibrium concentration (>92%) in bNb) [29].…”

Section: Effect Of Thermal History On Terminal Solid Solubilitysupporting

confidence: 55%

“…(1)), each sample was cut into two parts and one of them was heat treated at 500 Ce168 h. The atomic percentage of Nb in b phase of sample treated at 380 C e 24 h was 66% while in specimen treated at 500 C À168 h increased to 94 % (for details see [9]). The microstructure was also affected by the heat treatment, in the most aged material spheroidization of b phase was observed and the b phase percentage decreased ( Fig.…”

Section: Methodsmentioning

confidence: 99%

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Study of variables that affect hydrogen solubility in α + β Zr-alloys

Parodi

Ponzoni²,

Heras³

et al. 2016

Journal of Nuclear Materials

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Section: Effect Of Thermal History On Terminal Solid Solubilitysupporting

confidence: 55%

Section: Methodsmentioning

confidence: 99%

Study of variables that affect hydrogen solubility in α + β Zr-alloys

Parodi

Ponzoni²,

Heras³

et al. 2016

Journal of Nuclear Materials

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“…DHC velocity in Zr-2.5Nb alloy has been found to be controlled primarily by the its flow strength and microstructure, specifically the morphology of the b-phase, which affects hydrogen diffusivity [16,17]. Table 4 gives the DHC test temperature and cal- culated DHCV obtained for the irradiated and as-fabricated Zr-2.5Nb pressure tube.…”

Section: Resultsmentioning

confidence: 99%

Delayed hydride crack growth study on irradiated Zr–2.5Nb pressure tube

Shah

Dubey

Kumar

et al. 2015

Journal of Nuclear Materials

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“…• В безразмерном времени поэтапно (на отрезках длины h) численно интегриру-ем ODE-систему невысокого порядка ви-да (17). В [27] представлены и другие ODE-аппроксимации.…”

Section: J(t) 10unclassified

“…Здесь α функция параметра κ, по-лучаемая преобразованиями в силу обозначе-ний в (14) и (17). Элементарные, но несколько громоздкие формулы опускаем.…”

Section: обратная задача параметрической идентификацииunclassified

Inverse Problem of Identification of Hydrogen Thermodesorption Spectra

Заика

Kostikova

Zaika

2017

Proceedings of KarRC of RAS

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Институт прикладных математических исследований Карельского научного центра РАН, Петрозаводск В рамках технологических задач водородного материаловедения (включая про-ект ITER) ведется интенсивный поиск различных по назначению конструк-ционных материалов с заданными пределами водородопроницаемости. Одним из экспериментальных методов является термодесорбционная спектрометрия (ТДС). Образец, насыщенный водородом, дегазируется в условиях вакуумиро-вания и монотонного нагрева. С помощью масс-спектрометра регистрируется десорбционный поток, позволяющий судить о характере взаимодействия изото-пов водорода с твердым телом. В статье представлены распределенная краевая задача термодесорбции с динамическими граничными условиями и численный метод моделирования ТДС-спектра, требующий лишь интегрирования нели-нейной системы обыкновенных дифференциальных уравнений (ОДУ) невысо-кого порядка (по сравнению, например, с методом прямых). Предложен метод оценки коэффициентов растворения и десорбции в условиях реального дина-мического взаимодействия поверхностных и диффузионных процессов, без ис-кусственного разделения исследований на режимы лимитирования диффузией (DLR) и поверхностных реакций (SLR).К л ю ч е в ы е c л о в а: водородопроницаемость; поверхностные процессы; тер-модесорбция; динамические граничные условия; параметрическая идентифи-кация; численное моделирование. Yu. V. Zaika, E. K. Kostikova. INVERSE PROBLEM OF IDENTIFICATION OF HYDROGEN THERMODESORPTION SPECTRAOne of the technological challenges for hydrogen materials science (including the ITER project) is the currently active search for structural materials with various potential applications that will have predetermined limits of hydrogen permeability. One of the experimental methods is thermal desorption spectrometry (TDS). A hydrogen-saturated sample is degassed under vacuum and monotone heating. The desorption flux is measured by mass spectrometer to determine the character of interactions of hydrogen isotopes with the solid. The paper presents a distributed boundary-value problem of thermal desorption with dynamical boundary conditions and a numerical method for TDS spectrum simulation, where only integration of a nonlinear system of low order (compared with, e. g., the method of lines) ordinary differential equations (ODE) is required. A method for estimating dissolution and desorption coefficients in a real dynamic interaction of surface and diffusion processes without the artificial division of studies into diffusion limited regime (DLR) and surface limited regime (SLR) is suggested. This work was supported by the Russian Foundation for Basic Research (project № 15-01-00744).K e y w o r d s: hydrogen permeability; surface processes; thermal desorption; dynamical boundary conditions; parameter identification; numerical simulation. 31

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Evaluation of variables affecting crack propagation by Delayed Hydride Cracking in Zr–2.5Nb with different heat treatments

Cited by 17 publications

References 41 publications

Study of variables that affect hydrogen solubility in α + β Zr-alloys

Study of variables that affect hydrogen solubility in α + β Zr-alloys

Delayed hydride crack growth study on irradiated Zr–2.5Nb pressure tube

Inverse Problem of Identification of Hydrogen Thermodesorption Spectra

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