Strain evolution in Zr-2.5 wt% Nb observed with synchrotron X-ray diffraction

Shiman, Oksana; Skippon, Travis; Tulk, Eric; Daymond, Mark R.

doi:10.1016/j.matchar.2018.09.022

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…Первая производная кривой теплового расширения решетки, деленная на исходную величину межплоскостного расстояния соответствующей плоскости отражения, определяется как коэффициент теплового расширения решетки. Полуширина рефлексов содержит инструментальное уширение, объемное изменение размеров образца и уширение образца, вызванное размером зерна и микронапряжениями [15,16]. В этом эксперименте инструментальное уширение и уширение в результате измельчения зерна принимаются как не изменяемые с изменением температуры, поэтому все изменения FWHM объясняются эволюцией напряжений.…”

Section: методика исследованийunclassified

“…В связи с этим для обнаружения процессов несоответствия материалов по теплофизическим параметрам целесообразно использовать метод in situ синхротронной рентгеновской дифракции [14]. Величина полной ширины на полувысоте (FWHM) рентгеновских рефлексов может отражать эволюцию внутреннего напряжения при термической нагрузке [15,16]. Например, из-за теплового расширения происходят изменения межплоскостного расстояния, связанные с определенной кристаллографической ориентацией, в то время как расширение дифракционного пика происходит, если дефекты решетки присутствуют в достаточно большом количестве в пределах рассеивающего объема, а также при возникновении микронапряжений.…”

Section: Introductionunclassified

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In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

Vorontsov,

Filippov,

Shamarin

et al. 2023

Metal Working and Material Science

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Introduction. Thermal expansion is an important thermal and physical characteristic of materials, showing its expansion when heated. Knowing this property is important both from a scientific point of view and for practical applications. Materials with low thermal expansion are widely used in electronics, thermal barrier coatings and other applications. Mismatch in thermal expansion between different materials can lead to thermal stress on contact surfaces. The in-situ synchrotron X-ray diffraction method can detect this mismatch. Thermal stress requires an analysis of the coefficient of thermal expansion. Bulk expansion behavior is observed in thermally sprayed coatings. The CTE is important for designing and predicting coating performance under thermal stresses. Changes in the KTE can cause cracking and degradation of the coating. In-situ X-ray diffraction analysis helps to understand thermal expansion, crystallite size and stress and strain variation with temperature change. The aim of this work is to interpret and use in-situ high temperature X-ray diffraction as an effective tool to study the thermal mismatch behavior of a W-Co alloy substrate (8 % w/w Co, WC — matrix) with CrN, ZrN and CrZrN multilayer coatings and the characteristic differences between single component coatings and its combination in a multilayer coating. Research Methodology. In this work, specimens of chromium and zirconium nitride coatings deposited on W-Co hard alloy substrates were investigated. The fundamental method in this work is in-situ analysis using synchrotron radiation. The lattice parameter as a function of cycling temperature, the coefficient of thermal expansion during heating and cooling, and the thermal expansion mismatch between the substrate-coating pair and the coating layers in the multilayer coating were evaluated. Results and discussion. The lattice parameters and thermal expansion of the coatings are investigated. The lattice parameter of all coatings decreased during thermal cycling, indicating nitrogen evaporation. The multilayer coating has the least change in the parameter, possibly due to diffusion barriers. Lattice distortions do not differ between single and multilayer coatings. All coatings exhibit thermal expansion similar to the substrate. The multilayer coating creates conditions for compressive stresses in one phase and tensile stresses in the other phase, so the lifetime of multilayer coatings is expected to be high.

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Section: методика исследованийunclassified

Section: Introductionunclassified

In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

Vorontsov,

Filippov,

Shamarin

et al. 2023

Metal Working and Material Science

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“…Last but not least, Shiman et al investigated the strain state of a hybridized zirconium alloy during temperature fluctuation. The existence of brittle hybrids can profoundly affect the mechanical behavior of this material.…”

Section: Diffractionmentioning

confidence: 99%

Review on applications of synchrotron‐based X‐ray techniques in materials characterization

2020

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Synchrotron radiation (SR), as a result of its high-intensity, brilliant, monochromatic, and collimated beams, is becoming one of the most crucial components of research in various fields of materials science such as nanomaterials, biomaterials, and energy materials. SR-based characterization methods can be employed to analyze different systems such as powders, thin films, and bulk forms having complex crystalline or amorphous structures. In this review, peculiarities of SR are briefly explained. Moreover, various techniques carried out utilizing this instrument for material characterization such as X-ray powder diffraction, grazing-incidence X-ray diffraction, small/ wide-angle X-ray scattering, X-ray absorption spectroscopy, different techniques of X-ray imaging, X-ray photoelectron spectroscopy, and X-ray microprobes/nanoprobes are presented. As a result, by shedding light on the advantages of SR and its superiority to the equivalent laboratory experiments, researchers are recommended to exploit the capabilities of this invaluable tool in their materials characterization.

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Experimental evaluation of orientation and temperature dependent material stress-strain curves of Zr2.5%Nb Indian pressure tube material and development of a suitable anisotropic material model

Samal

Syed

Sen

et al. 2020

Journal of Nuclear Materials

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Strain evolution in Zr-2.5 wt% Nb observed with synchrotron X-ray diffraction

Cited by 8 publications

References 33 publications

In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

Review on applications of synchrotron‐based X‐ray techniques in materials characterization

Experimental evaluation of orientation and temperature dependent material stress-strain curves of Zr2.5%Nb Indian pressure tube material and development of a suitable anisotropic material model

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Strain evolution in Zr-2.5 wt% Nb observed with synchrotron X-ray diffraction

Cited by 8 publications

References 33 publications

In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

In situ crystal lattice analysis of nitride single-component and multilayer ZrN/CrN coatings in the process of thermal cycling

Review on applications of synchrotron‐based X‐ray techniques in materials characterization

Experimental evaluation of orientation and temperature dependent material stress-strain curves of Zr2.5%Nb Indian pressure tube material and development of a suitable anisotropic material model

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Strain evolution in Zr-2.5 wt% Nb observed with synchrotron X-ray diffraction