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UKAEA-CCFE-PR(25)3302025
A phase-field model is developed to simulate intergranular corrosion of ferritic/martensitic steels exposed to liquid lithium. The chromium concentration of the material is used to track the mass transport within the metal and liquid (corrosive) phase. The framework naturally captures intergranular corrosion by enhancing the di…
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UKAEA-CCFE-PR(24)2642024
Coolant-facing alloys in a tokamak will face harsh environments due to the synergistic effect of flowing coolant, mechanical cyclic loadings, and ionising radiation. Reduced activation ferritic/martensitic (RAF/M) EUROFER-97 is one of the top structural alloys selected to be used in fusion, however it was not designed to have excellent corrosi…
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UKAEA-CCFE-PR(24)2312024
The status of research and development on vanadium alloys and on their application as a structural material in the breeder blanket of a fusion power plant are reviewed. Emphasis has been placed on irradiation experiments and the effects of neutron and ion irradiation on the microstructure of the current reference alloy, V-4Cr-4Ti. The effects of a …
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UKAEA-CCFE-PR(23)1102022
The realisation of fusion energy depends on the development of advanced materials for challenging environments. Rapid screening of prototype alloys using magnetron sputtering and high throughput characterisation is currently being applied to candidate W alloys with improved mechanical performance, reduced activation and tolerance to damage from neu…
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UKAEA-CCFE-PR(21)502021
The results of small-scale mechanical tests are convoluted by the so-called size effect, whereby materials appear stronger when the scale of the test is reduced to the order of microns or less. The dimensional range over which this occurs has been shown to be linked to a change in sample microstructure, such as the addition of defects induced by…
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UKAEA-CCFE-CP(20)1202020
The divertor component is subject to some of the most extreme loading conditions in a fusion environment and the safety design window is relatively narrow. Variation in mechanical properties of the same material throughout a component is common place in practice and can be caused by both local effects of processing and joining, and local variations…
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UKAEA-CCFE-PR(19)352019
We analyse spherical nanoindentation of single crystal copper using two different indenter tips of radii 7.4 and 27 um. The surface deformation surrounding the indents was measured using atomic force microscopy and the elastic rotation fields under the indents were measured using electron diffraction and transmission techniques. Using the measured …
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UKAEA-CCFE-PR(19)012018
The effects of radiation damage on materials are strongly dependant on temperature, making it arguably the most significant parameter of concern in nuclear engineering. Owing to the challenges and expense of irradiating and testing materials, material property data is often limited to few irradiation conditions and material variants. A new techniqu…
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UKAEA-CCFE-PR(18)22018
Precipitation-hardened Cu-Cr-Zr will be used in heat-sink components in the Iter tokomak. After irradiation it will not be possible to test the mechanical properties of Cu-Cr-Zr using conventional, large-scale, techniques and methods requiring reduced sample sizes will have to be used. Spherical nano-indentation is one such method. In this work, Cu…
Showing 1 - 9 of 9 UKAEA Paper Results
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