ORCID Profile
0000-0001-6242-7489
Current Organisation
Queen's University
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Publisher: Elsevier BV
Date: 07-2009
Publisher: Elsevier BV
Date: 11-2006
Publisher: International Union of Crystallography (IUCr)
Date: 10-11-2006
DOI: 10.1107/S0021889806042245
Abstract: 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 s les, 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.
Publisher: Elsevier BV
Date: 05-2007
Publisher: Elsevier BV
Date: 03-2013
Publisher: Elsevier BV
Date: 11-2012
Publisher: Crossref
Date: 12-2001
Publisher: Elsevier BV
Date: 06-2013
Publisher: Elsevier BV
Date: 04-2002
Publisher: Elsevier BV
Date: 07-2004
Publisher: Crossref
Date: 12-2001
Publisher: Trans Tech Publications, Ltd.
Date: 07-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.278.144
Abstract: Understanding the relationship between deformation mechanisms and microstructure is essential if one wants to fully exploit the potential of advanced nickel base superalloys and develop future alloys. In the present work, the influence of the lattice misfit between and ’ has been studied by means of in-situ loading experiments using neutron diffraction in combination with crystal plasticity modelling on RR1000 and Alloy 720Li. Both alloys were processed to generate three simplified uni-modal γ’ microstructures to allow determination of γ’ responses and experiments were carried out at 750°C. The results showed that a positive misfit strain increases the level of load partitioning from to ’ during plastic deformation introduced by uniaxial tensile loading.
Publisher: Springer Science and Business Media LLC
Date: 14-04-2015
DOI: 10.1557/JMR.2015.89
Publisher: Elsevier BV
Date: 07-2004
Publisher: Elsevier BV
Date: 08-2014
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Mark Daymond.