Neutron diffraction or elastic neutron scattering is the application of neutron scattering to the determination of the atomic and/or magnetic structure of a material. A sample to be examined is placed in a beam of thermal or cold neutrons to obtain a diffraction pattern that provides information of the structure of the material. The technique is similar to X-ray diffraction but due to their different scattering properties, neutrons and X-rays provide complementary information: X-Rays are suited for superficial analysis, strong x-rays from synchrotron radiation are suited for shallow depths or thin specimens, while neutrons having high penetration depth are suited for bulk samples.
Dorte Juul Jensen is a senior scientist and head of the Center for Fundamental Research: Metal Structures in Four Dimensions and Materials Research Division, Risø DTU National Laboratory for Sustainable Energy, Roskilde, Denmark. Risø operates under the auspices of the Danish Ministry of Science, Technology and Innovation, researching a wide range of technologies and training Ph.D candidates in the sciences.
The Open-pool Australian lightwater reactor (OPAL) is a 20 megawatt (MW) swimming pool nuclear research reactor. Officially opened in April 2007, it replaced the High Flux Australian Reactor as Australia's only nuclear reactor, and is located at the Australian Nuclear Science and Technology Organisation (ANSTO) Research Establishment in Lucas Heights, New South Wales, a suburb of Sydney. Both OPAL and its predecessor have been commonly known simply as the Lucas Heights reactor.
In materials science and solid mechanics, residual stresses are stresses that remain in a solid material after the original cause of the stresses has been removed. Residual stress may be desirable or undesirable. For example, laser peening imparts deep beneficial compressive residual stresses into metal components such as turbine engine fan blades, and it is used in toughened glass to allow for large, thin, crack- and scratch-resistant glass displays on smartphones. However, unintended residual stress in a designed structure may cause it to fail prematurely.
A diffractometer is a measuring instrument for analyzing the structure of a material from the scattering pattern produced when a beam of radiation or particles interacts with it.
Powder diffraction is a scientific technique using X-ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. An instrument dedicated to performing such powder measurements is called a powder diffractometer.
The Australian Nuclear Science and Technology Organisation (ANSTO) is a statutory body of the Australian government, formed in 1987 to replace the Australian Atomic Energy Commission. Its head office and main facilities are in southern outskirts of Sydney at Lucas Heights, in the Sutherland Shire.
The ISIS Neutron and Muon Source is a pulsed neutron and muon source, established 1984 at the Rutherford Appleton Laboratory of the Science and Technology Facilities Council, on the Harwell Science and Innovation Campus in Oxfordshire, United Kingdom. It uses the techniques of muon spectroscopy and neutron scattering to probe the structure and dynamics of condensed matter on a microscopic scale ranging from the subatomic to the macromolecular.
High-energy X-rays or HEX-rays are very hard X-rays, with typical energies of 80–1000 keV (1 MeV), about one order of magnitude higher than conventional X-rays used for X-ray crystallography. They are produced at modern synchrotron radiation sources such as the beamline ID15 at the European Synchrotron Radiation Facility (ESRF). The main benefit is the deep penetration into matter which makes them a probe for thick samples in physics and materials science and permits an in-air sample environment and operation. Scattering angles are small and diffraction directed forward allows for simple detector setups.
ANSTO's Australian Synchrotron is a 3 GeV national synchrotron radiation facility located in Clayton, in the south-eastern suburbs of Melbourne, Victoria, which opened in 2007.
ENGIN-X is the dedicated materials engineering beamline at the ISIS Neutron and Muon Source in the UK.
The Australian Centre for Neutron Scattering (ACNS), formerly the Bragg Institute, is a landmark neutron and X-ray scattering facility in Australia. It is located at the Australian Nuclear Science and Technology Organisation's (ANSTO) Lucas Heights site, 40 km south-west of Sydney, in New South Wales, Australia.
John M. "Jack" Carpenter was an American nuclear engineer known as the originator of the technique for utilizing accelerator-induced intense pulses of neutrons for research and developing the first spallation slow neutron source based on a proton synchrotron, the Intense Pulsed Neutron Source (IPNS). He died on 10 March 2020.
A materials oscilloscope is a time-resolved synchrotron high-energy X-ray technique to study rapid phase composition and microstructural related changes in a polycrystalline sample. Such device has been developed for in-situ studies of specimens undergoing physical thermo-mechanical simulation.
Philip John Withers FREng FRS is the Regius Professor of Materials in the School of Materials, University of Manchester. and Chief Scientist of the Henry Royce Institute.
Klaus-Dieter Liss, German: Liß, is a German-Australian physicist working in the field of experimental X-ray and neutron scattering and their applications. Liss research is on in-situ and real-time experiments with synchrotron and neutron radiation for the characterization of thermo-mechanical processes in metals; the investigation of phase transformations; the evolution of microstructures; and the kinetics of defects. His experimental achievements are the development of the Materials oscilloscope and the realization of the X-ray photon storage.
Vanessa K. Peterson or Vanessa Peterson is Neutron Instrument Scientist, at Australian Nuclear Science and Technology Organisation (ANSTO). She established an independent research program at ANSTO which specialised on improving understanding of energy systems and how they work. She manages the Echidna program, a high-resolution powder diffractometer, as well as Wombat - a high-intensity powder diffractometer. Peterson's expertise includes synchtron and laboratory x-ray techniques, as well as neutron powder diffraction, as well as single crystal x-ray diffraction.
475 °C embrittlement is the loss of plasticity in stainless steel with a ferrite phase if it is heated in the range of 315 °C to 540 °C. This type of embrittlement can lead to fracture failure.
Helen Maynard-Casely is an instrument scientist at the Australian Centre for Neutron Scattering at the Australian Nuclear Science and Technology Organisation (ANSTO) in Sydney, Australia. She has won numerous prizes and is an advocate for the participation of women in STEM.
David Dye is a Professor of Metallurgy at Imperial College London. Professor Dye specialises in fatigue and micromechanics of aerospace and nuclear materials, mainly Ni/Co superalloys, Titanium, TWIP steel, and Zirconium alloys.
