Speaker
Description
In the past few years, the idea of Bragg edge round robin activities has been presented. The aim is to benchmark the known and new capabilities on different types of neutron imaging instruments, and to assess levels of accuracy, precision, and detection limits of Bragg edge transmission imaging mainly for, but not limited to, strain mapping. A preliminary campaign of characterization of sample candidates for a Bragg edge round robin has been performed and lessons learned from the campaign have been reported at previous NEUWAVE meetings. Now it is imperative and timely that the Bragg edge round robin activities are defined with regard to project objectives, sample candidates, and the measurement protocol.
A set of standard samples is being proposed. This includes ring & plug samples, a AlSiC met-al matrix composite, and more recently, U-flexures samples data of which will be presented. The latter sample set has the advantage of being able to produce spare set with near-identical properties and, since it is one of the standard samples from EASI-STRESS1 project, having been characterized with other methods, e.g., neutron diffraction and synchrotron X-ray diffraction. Strain maps produced by Bragg edge imaging on IMAT@ISIS on the new samples are presented in Figure 1. At this opportunity, we will propose a list of requirement for samples, discuss a possible measurement prototol, and more importantly gather input from the community on how the round robin activities should be approached. By the end of the workshop, it is hoped that a consensus can be achieved and that a draft document can be produced which will outline when and how the round robin activities can be launched.
| Abstract Topic | Development of experimental techniques and new principles |
|---|
