E. Andrew Payzant
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View article: Thermal expansion of LaB<sub>6</sub> from 298 to 998 K
Thermal expansion of LaB<sub>6</sub> from 298 to 998 K Open
We propose LaB 6 as a temperature calibration standard for high-temperature (HT) X-ray diffractometry owing to its high temperature stability. Such HT applications require a reliable HT lattice parameter or, equivalently, peak position dat…
View article: Neutron Residual Stress Mapping of Repaired Spent Nuclear Fuel Welded Stainless-Steel Canisters
Neutron Residual Stress Mapping of Repaired Spent Nuclear Fuel Welded Stainless-Steel Canisters Open
Stress corrosion cracking (SCC) caused by atmospheric deposition and deliquescence of aggressive compounds such as chloride-containing salts or oxidized sulfur species may pose a potential issue to the extended service life of spent nuclea…
View article: The high intensity diffractometer for residual stress analysis (HIDRA), a third generation residual stress mapping neutron diffractometer at the high flux isotope reactor
The high intensity diffractometer for residual stress analysis (HIDRA), a third generation residual stress mapping neutron diffractometer at the high flux isotope reactor Open
This paper describes the hardware and software upgrades, operation, and performance of the high intensity diffractometer for residual stress analysis (HIDRA) instrument, a residual stress mapping neutron diffractometer located at the High …
View article: Characterization of dielectric materials
Characterization of dielectric materials Open
A system and a method for characterizing a dielectric material are provided. The system and method generally include applying an excitation signal to electrodes on opposing sides of the dielectric material to evaluate a property of the die…
View article: Low temperature proton conducting oxide devices
Low temperature proton conducting oxide devices Open
A device for conducting protons at a temperature below 550.degree. C. includes a LAMOX ceramic body characterized by an alpha crystalline structure.
View article: Forming gas treatment of lithium ion battery anode graphite powders
Forming gas treatment of lithium ion battery anode graphite powders Open
The invention provides a method of making a battery anode in which a quantity of graphite powder is provided. The temperature of the graphite powder is raised from a starting temperature to a first temperature between 1000 and 2000.degree.…
View article: Quantitative texture analysis at the WAND<sup>2</sup> and HIDRA diffractometers
Quantitative texture analysis at the WAND<sup>2</sup> and HIDRA diffractometers Open
Data collection and analysis strategies have been developed for efficient and reliable crystallographic texture measurements at two recently upgraded neutron diffractometers: the Wide Angle Neutron Diffractometer Squared (WAND 2 ) and the …
View article: Residual Stress Modeling and Advanced Diffraction Measurements of 347H Steel Weldments
Residual Stress Modeling and Advanced Diffraction Measurements of 347H Steel Weldments Open
The 347H stainless steel is a primary high-temperature material for many energy and power generation industries. Stress relief cracking (SRC) has been a particular concern in welding of this material. The residual stress induced by welding…
View article: Quantitative texture analysis using the NOMAD time-of-flight neutron diffractometer
Quantitative texture analysis using the NOMAD time-of-flight neutron diffractometer Open
Strategies for efficient and reliable texture measurements have been explored using the Nanoscale Ordered Materials Diffractometer (NOMAD) at the Spallation Neutron Source located at Oak Ridge National Laboratory (ORNL). To test these stra…
View article: Mapping of Texture and Phase Fractions in Heterogeneous Stress States during Multiaxial Loading of Biomedical Superelastic NiTi
Mapping of Texture and Phase Fractions in Heterogeneous Stress States during Multiaxial Loading of Biomedical Superelastic NiTi Open
Thermoelastic deformation mechanisms in polycrystalline biomedical‐grade superelastic NiTi are spatially mapped using in situ neutron diffraction during multiaxial loading and heating. The trigonal R‐phase is formed from the cubic phase du…
View article: Experimental determination of precision, resolution, accuracy and trueness of time-of-flight neutron diffraction strain measurements
Experimental determination of precision, resolution, accuracy and trueness of time-of-flight neutron diffraction strain measurements Open
A simple statistical analysis which yields the precision, resolution, accuracy and trueness of diffraction-based lattice strain measurements is discussed. The procedure consists of measuring the thermal expansion induced in each component …
View article: First Experiments: New Science Opportunities at the Spallation Neutron Source Second Target Station (abridged)
First Experiments: New Science Opportunities at the Spallation Neutron Source Second Target Station (abridged) Open
This brochure is an abridged version of a more comprehensive companion report. DOE proposes to build a Second Target Station (STS) at SNS to produce beams of cold neutrons with world-leading peak brightness at a repetition rate of 15 Hz, p…
View article: First Experiments: New Science Opportunities at the Spallation Neutron Source Second Target Station
First Experiments: New Science Opportunities at the Spallation Neutron Source Second Target Station Open
Leadership in materials science underpins future technologies in energy, security, and other applications that drive this nation’s economy. Neutron scattering is among the crucial characterization techniques necessary to ensure a world-lea…
View article: Probing orientation information using 3-dimensional reciprocal space volume analysis
Probing orientation information using 3-dimensional reciprocal space volume analysis Open
The crystallographic texture of polycrystalline materials is the result of how these materials are processed and what external forces materials have experienced. Neutron and X-ray diffraction are standard methods to characterize global cry…
View article: •Exploring the Cooling Process for Residual Stress Reduction in Dissimilar Welds
•Exploring the Cooling Process for Residual Stress Reduction in Dissimilar Welds Open
Dissimilar metal welds are currently used in various industry applications; however, a significant number of failures have been reported in these joints due to the existence of large tensile residual stresses induced by arc welding process…
View article: Current capabilities of the residual stress diffractometer at the high flux isotope reactor
Current capabilities of the residual stress diffractometer at the high flux isotope reactor Open
The engineering diffractometer 2nd Generation Neutron Residual Stress Facility (NRSF2) at the Oak Ridge National Laboratory’s High Flux Isotope Reactor was built specifically for the mapping of residual strains. NRSF2 is optimized to inves…
View article: Neutron Residual Stress Mapping for Spent Nuclear Fuel Storage Canister Weldment
Neutron Residual Stress Mapping for Spent Nuclear Fuel Storage Canister Weldment Open
Many radioactive materials within the nuclear fuel cycle present a significant hazard. Such materials include spent nuclear fuel, high-level waste, legacy waste and other nuclear materials that have no current outlet than storage. These ma…
View article: Path length dependent neutron diffraction peak shifts observed during residual strain measurements in U–8 wt% Mo castings
Path length dependent neutron diffraction peak shifts observed during residual strain measurements in U–8 wt% Mo castings Open
This study reports an angular diffraction peak shift that scales linearly with the neutron beam path length traveled through a diffracting sample. This shift was observed in the context of mapping the residual stress state of a large U–8 w…