ENGIN-X: a third-generation neutron strain scanner

By J. Santisteban, Mark R. Daymond, J. James, L. Edwards. 2006

327 citations recorded by the source corpus.

ENGIN-X, a new time-of-flight (TOF) neutron diffractometer optimized to measure elastic strains at precise locations in bulky specimens recently commissioned at the ISIS Facility in the Rutherford Laboratory, UK, is described. Fast counting times, together with a flexible and accurate definition of the instrumental gauge volume are the main requirements of neutron strain scanning and have been addressed on ENGIN-X through the design of a novel TOF diffractometer with a tuneable resolution and interchangeable radial collimators. Further, the routine operation of the instrument has been optimized by creating a virtual instrument, i.e. a three-dimensional computer representation of the diffractometer and samples, which assists in the planning and execution of experiments. On comparing ENGIN-X with its predecessor ENGIN, a 25× gain in performance is found, which has allowed the determination of stresses up to 60 mm deep in steel specimens. For comparison with constant-wavelength diffractometers, special attention has been paid to the absolute number of counts recorded during the experiments. A simple expression is presented for the estimation of counting times in TOF neutron strain scanning experiments.

Subfields: Geophysics, Materials Chemistry, Radiation

View Paper: https://www.semanticscholar.org/paper/a89b812c5304996860f45bdf581d147e82c542a5

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In Materials Chemistry

Citations in the corpus

Deformation mechanisms of Mo alloyed FeCoCrNi high entropy alloy: In situ neutron diffraction (2017, methodology): “In situ time-of flight (TOF) neutron diffraction measurements during tensile deformation were performed on the ENGIN-X diffractometer using a stress rig (ISIS spallation neutron source, the Rutherford Appleton Laboratory, UK)[27].”
Thermo-mechanical analysis of Wire and Arc Additive Layer Manufacturing process on large multi-layer parts (2011, methodology): “The time-of-flight principle of strain measurement is utilised to determine the lattice strain [24, 25].”
Non-destructive testing and evaluation of composite materials/structures: A state-of-the-art review (2020, methodology): “s, soft matter, materials science, geosciences and biology [235]. A schematic example of NSS using ENGIN-X (ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, UK) is presented in Figure 13 [236]. The pulsed neutron beam with a wide range of energy travels to the sample and, being scattere”
Residual stress and texture control in Ti-6Al-4V wire + arc additively manufactured intersections by stress relief and rolling (2018, methodology): “Lattice plane spacing measurements for residual stress calculation were carried out at the ENGIN-X time-of-flight neutron diffractometer at the pulsed neutron source of the Rutherford Appleton Laboratory in Didcot, UK [28].”