
James Marrow
@james_marrow
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My research is focussed on the degradation of structural materials and the role of microstructure.
Oxford University
Joined May 2011
New article from @OxfordMaterials: on in situ study of damage development in a needle-stitched ceramic matrix composites
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Using x-ray radiographs @DiamondLightSou to see the crack, which we’ll tomograph in 3D. Here’s one (just a mobile phone photo of the screen!). The sample is 0.5 mm thick, and we’ll grow the crack in steps of 40 um (less than the thickness of a human hair). @OxfordMaterials
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Team from @OxfordMaterials back @DiamondLightSou for another experiment on i12. We’re watching how cracks grow between the sheets in carbon-fibre composite for aerospace. We want to know how to make it tougher. Our loading rig (beige cylinder thing) is in front of the camera
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Very clear report by #HouseofLords on critical need for UK Government decision on the future of #nuclear energy
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#RobotWars @DiamondLightSou ?.No, we're investigating the toughness of natural biomaterials with #xray #tomography
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Graphite cracking up at 850C. Measuring how it takes the strain with #neutrons and image analysis. @OxfordMaterials @STFC_Matters
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#nuclear graphite at 850C, being slow loaded to investigate its strength. The donuts helped! @OxfordMaterials with @STFC_Matters #neutrons
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Furnace and neutron source problems. morale dropping?@OxfordMaterials @STFC_Matters. Science is tough, but Donuts could be the solution
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@mmostafavi1 @DiamondLightSou @james_marrow it's been great to share this unique beamline with @BristolUni team (& Tim from @portsmouthuni).
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A quick visualisation of the fatigue crack we've nurtured over the past few days. Now for the analysis! @OxfordMaterials @DiamondLightSou 😫
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300000 more fatigue cycles and a bit more load, but we overcame 'closure'. Can you spot the difference?.@OxfordMaterials @DiamondLightSou
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@mmostafavi1 Not quite, but we've given it 250,000 cycles and it's not budged (yet) - that's the power of fatigue crack closure for you!.
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It moves!! This is the unique rig @OxfordMaterials is using to grow a fatigue crack and record high resolution tomographs @DiamondLightSou
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Do you recall the teeny-tiny fatigue crack we tweeted a little while ago? It's grown. @DiamondLightSou @OxfordMaterials
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RT @MEx_ESRF: @RockSquasher @DiamondLightSou Have a plan A, a plan A2, A3, Plan B, Plan B2. ! Organise shifts for the team. Oh and coffee.….
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